American History: A Complete Timeline from Indigenous America to Today
American history did not begin when European colonists arrived, and it did not end when the United States declared independence in 1776. The American history timeline stretches back thousands of years, when Indigenous peoples established diverse societies across North America, and continues through colonization, revolution, territorial expansion, civil war, industrialization, world wars, civil rights struggles, technological revolutions, and the political and social changes of the twenty-first century.
The United States emerged from that much longer history. Its institutions were shaped by European colonial traditions, Indigenous diplomacy and resistance, the Atlantic slave trade, migration, religious movements, warfare, economic transformation, constitutional experiments, and conflicts over the meaning of citizenship and freedom. A useful timeline therefore needs to include both the achievements that built the country and the conflicts that repeatedly forced Americans to reconsider who possessed power and rights.
The Library of Congress organizes U.S. history into major periods including colonial settlement, the Revolution, the early republic, expansion and reform, the Civil War and Reconstruction, industrialization, the Progressive Era, the Great Depression and World War II, and the postwar period.
Quick Facts
Period: More than 15,000 years of human history in what is now the United States, with the history of the United States as an independent nation beginning in the late eighteenth century.
Location: North America, centered on the territory of the present-day United States.
Major historical populations: Hundreds of Indigenous nations; European settlers and colonial populations; enslaved and free Africans and African Americans; immigrants from Europe, Asia, Latin America, and other regions; and generations of later immigrant communities.
Defining themes: Indigenous continuity and resistance, colonization, migration, democracy, slavery, territorial expansion, industrialization, immigration, war, civil rights, economic change, and technological transformation.
Important principle: There is no single experience of American history. Different regions, classes, ethnic groups, Indigenous nations, and communities experienced the same historical periods differently.
1. Indigenous America Before European Colonization
Human history in North America is much older than the United States. Archaeological evidence indicates that people were living in the Americas by the end of the last Ice Age, and the National Park Service notes that archaeologists and Native peoples generally agree that sustainable populations existed in the Americas by roughly 15,000 years ago, while the exact timing and routes of earlier migrations remain debated.
These early inhabitants did not form one unified culture. Over thousands of years, Indigenous societies developed in environments ranging from Arctic coastlines and Pacific forests to the Great Plains, Mississippi Valley, deserts of the Southwest, and Atlantic seaboard.
Agriculture transformed many communities. The cultivation of maize, beans, squash, and other crops supported increasingly complex settlements. In the Mississippi Valley, societies constructed enormous earthworks and developed long-distance trade networks. In the Southwest, Pueblo communities built sophisticated settlements adapted to arid environments. Along the eastern seaboard, Indigenous nations maintained political alliances, agricultural communities, hunting territories, and extensive systems of diplomacy.
The political landscape was equally diverse. There were confederacies, chiefdoms, village networks, independent nations, and communities organized around kinship and clan structures. The Haudenosaunee Confederacy, for example, developed a political system involving multiple nations in the northeastern woodlands.
This diversity is essential to understanding later American history. European settlers did not enter an empty wilderness. They entered an already inhabited continent containing established societies, economies, territorial boundaries, diplomatic relationships, and political systems. The National Park Service’s historical material on the Powhatan peoples, for example, describes a large Indigenous political system in Virginia before the English established Jamestown.
2. European Exploration and Early Colonization, 1492–1607
European expansion into the Americas accelerated after 1492. Spanish, French, English, Dutch, and other European powers competed for territory, trade, and strategic influence.
The consequences for Indigenous peoples were enormous. European diseases caused catastrophic population losses in many regions, while warfare, displacement, enslavement, trade, missionary activity, and changing political alliances reshaped Indigenous societies.
Spanish colonists established St. Augustine in Florida in 1565, creating one of the oldest continuously inhabited European-founded settlements within the present-day United States.
England’s efforts developed differently. Roanoke Island became the setting for failed English colonization attempts in the 1580s, producing one of the most famous unresolved mysteries in American history. The later 1587 settlement disappeared from Roanoke while John White was absent, eventually generating the “Lost Colony” story. HiddenFrontiers examines this episode in detail in its Roanoke Colony mystery article.
English colonization became more permanent with Jamestown in Virginia in 1607.
3. English Colonies, 1607–1754
Jamestown was established in 1607 by the Virginia Company. The settlement struggled with disease, hunger, political disputes, and difficult relationships with neighboring Indigenous communities. Yet Virginia eventually developed a plantation economy heavily dependent on tobacco.
Farther north, English settlements emerged in New England. Plymouth was established in 1620, followed by the expansion of Massachusetts and other colonies.
By the eighteenth century, the English colonies had developed distinct regional economies and societies. New England relied heavily on maritime trade, fishing, shipbuilding, farming, and commerce. The Middle Colonies had productive agriculture and diverse populations. The Chesapeake and southern colonies developed plantation economies that became increasingly dependent on enslaved African labor.
Slavery was not confined to one colony or region, but its economic importance became particularly significant in plantation agriculture. The Atlantic slave trade forcibly transported millions of Africans to the Americas, and colonial laws increasingly defined slavery through race and hereditary status.
Colonial society was also characterized by unequal political power. White male property holders generally enjoyed the greatest political participation, while women, enslaved people, many poor people, and Indigenous peoples were excluded from colonial political systems.
At the same time, colonial assemblies developed traditions of local self-government. Those institutions later became important in the political arguments that preceded independence.
4. The French and Indian War and Rising Resistance, 1754–1775
The Seven Years’ War became a global conflict, and in North America the fighting between Britain and France became known as the French and Indian War.
The war ended French political dominance in much of mainland eastern North America, but Britain emerged with enormous debts. British officials attempted to raise revenue from the colonies through measures such as the Stamp Act of 1765.
Colonial resistance intensified.
The Boston Massacre took place in 1770. The Boston Tea Party followed in 1773. Parliament responded with punitive legislation, while colonial leaders increasingly coordinated resistance.
The First Continental Congress met in Philadelphia in 1774. Fighting began the following year at Lexington and Concord.
The Library of Congress records April 19, 1775, as the date British and American forces exchanged fire at Lexington and Concord; George Washington was commissioned commander in chief soon afterward.
The political dispute had now become a war.
5. The American Revolution and Independence, 1775–1783
The American Revolution was both a war for independence and a political struggle over authority.
On July 4, 1776, the Continental Congress adopted the Declaration of Independence. The document asserted that political legitimacy ultimately rested on the rights of the people, while declaring the colonies independent of Britain.
The war continued for several years. American forces faced the powerful British military, but foreign assistance, especially from France, became critical to the American cause.
The decisive turning point came at Yorktown in 1781, when British forces under General Charles Cornwallis surrendered to Washington and allied French forces. The Treaty of Paris, signed in 1783, formally ended the war and recognized American independence.
Independence, however, solved the question of sovereignty without solving the deeper questions of political power, slavery, Indigenous land, representation, and the structure of the new republic.
6. Creating the United States, 1783–1815
The new nation initially operated under the Articles of Confederation. The system created a weak central government and struggled with taxation, commerce, debt, and disputes among the states.
In 1787, delegates met in Philadelphia to create a new constitutional system. The Constitution was signed on September 17, 1787, and ratification followed.
The Constitution established a stronger federal government divided among executive, legislative, and judicial branches. The Bill of Rights, ratified in 1791, added protections for liberties including speech, religion, press, and assembly.
George Washington became the first president under the new Constitution in 1789.
The early republic soon developed political divisions. Federalists favored stronger national institutions, while Democratic-Republicans opposed what they saw as excessive federal power.
Territorial expansion accelerated in 1803 with the Louisiana Purchase, dramatically enlarging the nation’s territory.
The War of 1812 against Britain followed from disputes involving maritime rights, trade, and the wider struggle between Britain and France. The conflict strengthened a growing sense of American national identity but also exposed continued vulnerability.
7. Expansion, Reform, and the Crisis of Slavery, 1815–1860
The nineteenth century transformed the United States.
Transportation improvements, canals, roads, steamboats, and later railroads connected markets. Industrial production expanded. New settlements moved westward.
But expansion came at an enormous human cost for Indigenous peoples.
The Indian Removal Act of 1830 authorized the forced relocation of Native nations from their lands east of the Mississippi. The Cherokee removal of 1838 became known as the Trail of Tears; the National Park Service notes that more than 16,000 Cherokee people were forcibly removed and that thousands died during the broader removal process.
Treaties between the United States and Indigenous nations were repeatedly negotiated, modified, broken, or ignored. The Smithsonian notes that Native nations entered treaties with the United States as sovereign nations, and that many treaties were later broken or coerced.
At the same time, slavery expanded with cotton cultivation in the South.
The Missouri Compromise of 1820 temporarily attempted to manage the balance between slave and free states. The annexation of Texas, the Mexican-American War, and the acquisition of western territory intensified the argument over whether slavery should expand.
The Compromise of 1850, Kansas-Nebraska Act, Dred Scott decision, and violent conflict in Kansas demonstrated that political compromise was becoming increasingly difficult.
By the 1850s, abolitionists, pro-slavery politicians, free-soil advocates, enslaved people seeking freedom, and other reformers had pushed slavery to the center of national politics.
The presidential election of Abraham Lincoln in 1860 triggered secession by Southern states.
8. The Civil War, 1861–1865
The Civil War began in 1861 after Confederate forces attacked Fort Sumter.
The conflict was fundamentally tied to slavery and the political crisis surrounding its expansion and preservation, while questions of federal authority and the Union were also central.
The war became the bloodiest conflict in American history.
Early Confederate victories were followed by major Union successes at places such as Gettysburg and Vicksburg in 1863. The Union blockade and destruction of Southern infrastructure gradually weakened the Confederacy.
Lincoln’s Emancipation Proclamation, issued during the war, declared enslaved people in areas under rebellion to be free, though it did not immediately abolish slavery throughout the United States.
Permanent abolition required constitutional action. The 13th Amendment was ratified on December 6, 1865, and abolished slavery in the United States.
Confederate General Robert E. Lee surrendered at Appomattox Court House in April 1865. Lincoln was assassinated days later.
The Union survived, but the war had created an enormous new challenge: how to reconstruct the South and define freedom and citizenship after slavery.
9. Reconstruction, 1865–1877
Reconstruction attempted to rebuild the former Confederate states and establish new political and legal rights for formerly enslaved people.
The 13th Amendment abolished slavery. The 14th Amendment established national citizenship and guaranteed equal protection of the laws. The 15th Amendment prohibited denying voting rights on the basis of race, color, or previous condition of servitude.
The National Archives notes that the 14th Amendment, ratified in 1868, established citizenship for people born or naturalized in the United States and extended major constitutional protections to formerly enslaved people.
Black Americans participated in politics at unprecedented levels during Reconstruction. African American legislators served in state governments and Congress, and constitutional changes transformed the legal structure of the nation.
Yet Reconstruction faced intense resistance. Southern governments introduced discriminatory Black Codes, white supremacist organizations used violence and intimidation, and federal enforcement remained politically contested.
Reconstruction eventually ended as federal political commitment weakened. The consequences were profound. Southern states developed systems of racial segregation and disenfranchisement that would persist for decades.
10. Industrial America and the Gilded Age, 1870s–1900
After the Civil War, the United States entered a period of extraordinary industrial expansion.
Railways linked distant regions, factories expanded, steel production increased, and corporations grew to unprecedented sizes.
The completion of the transcontinental railroad helped connect eastern and western markets, although expansion also brought renewed conflict with Indigenous peoples and accelerated the dispossession of Native lands.
Cities such as New York, Chicago, and Pittsburgh became major industrial centers. Millions of immigrants arrived, especially from Europe, supplying labor for factories, mines, railroads, construction, and urban businesses.
Industrialization created enormous wealth but also severe inequality.
Factory workers often endured long hours, dangerous conditions, low wages, and limited legal protections. Labor unions organized strikes and campaigns for better conditions.
The period became known as the Gilded Age because the country’s extraordinary economic growth existed alongside political corruption, social inequality, and poverty.
The United States was becoming an industrial and financial power, but the benefits of that transformation were very unevenly distributed.
11. Progressive Era and World War I, 1900–1919
Reformers responded to the problems of industrial capitalism.
Progressive reform campaigns targeted corruption, unsafe food and medicine, child labor, monopolies, poor housing, and political abuses. The federal government increasingly intervened in economic and social matters.
The women’s suffrage movement achieved a constitutional breakthrough with the 19th Amendment. Ratified on August 18, 1920, it prohibited denying the vote on the basis of sex.
The Progressive Era also included conservation efforts associated with leaders such as Theodore Roosevelt.
Meanwhile, African Americans were increasingly moving from the rural South to Northern and Midwestern cities. The Great Migration accelerated during and after World War I, driven by the search for industrial employment and an effort to escape Southern racial violence and discrimination.
The United States entered World War I in 1917, helping tip the balance toward the Allied powers.
Although American forces played an important role in the final phase of the war, the United States later struggled with how deeply it should remain involved in international affairs.
12. The Roaring Twenties and the Great Depression, 1920–1941
The 1920s brought rapid social and economic change.
Automobiles transformed mobility. Radio became a mass medium. Consumer credit expanded. Movies and popular entertainment reached national audiences. Cities grew, and new cultural movements emerged.
The prosperity was not universal, however. Farmers experienced severe economic problems, racial discrimination remained widespread, and inequality persisted.
The stock-market crash of October 1929 helped usher in the Great Depression.
The Library of Congress describes the Depression as a period in which jobs, savings, farms, and homes came under severe pressure. At its depth, more than one-quarter of the American workforce was unemployed.
Franklin D. Roosevelt became president in 1933 and introduced the New Deal, a broad collection of programs designed to provide relief, recovery, and reform.
The federal government expanded its role in banking, labor, infrastructure, social welfare, and economic regulation.
The Dust Bowl compounded the crisis in the Great Plains, forcing many farming families to migrate.
The Depression did not simply change the economy. It permanently expanded Americans’ expectations of what the federal government might do during a national emergency.
13. World War II, 1941–1945
The United States initially attempted to remain outside the major war in Europe and Asia.
That changed on December 7, 1941, when Japan attacked Pearl Harbor.
The United States declared war on Japan, and Germany and Italy subsequently declared war on the United States. American society and industry rapidly mobilized.
Millions of Americans entered military service. Women took jobs in industries previously dominated by men. Factories produced aircraft, ships, vehicles, weapons, and other supplies on an enormous scale.
The war also exposed severe contradictions in American society. Japanese Americans were forcibly incarcerated, while African Americans challenged discrimination in military service and defense industries.
The Allied victory in 1945 established the United States as one of the world’s two dominant superpowers.
The atomic bombings of Hiroshima and Nagasaki ended the Pacific war but introduced the nuclear age.
14. Cold War America, 1945–1960s
The defeat of Nazi Germany left the United States and Soviet Union as rival superpowers.
The Cold War was not a conventional war between the two countries. Instead, it involved military alliances, nuclear weapons, intelligence operations, ideological competition, technological rivalry, and conflicts fought through allied states.
The United States participated in the creation of NATO in 1949. American foreign policy increasingly emphasized containment of Soviet influence.
The Korean War demonstrated the danger of Cold War conflicts becoming shooting wars.
At home, anti-communist fears contributed to investigations, blacklists, and political controversies associated with McCarthyism.
The postwar period also created rapid economic growth. Suburbs expanded, home ownership increased, and consumer goods became increasingly available to middle-class families.
Television transformed American culture.
The Space Race became another defining element of the Cold War. On July 20, 1969, Apollo 11 successfully landed astronauts on the Moon, with Neil Armstrong and Edwin “Buzz” Aldrin walking on the lunar surface while Michael Collins remained in lunar orbit.
15. Civil Rights and Social Change, 1950s–1970s
The postwar era produced one of the most important transformations in American constitutional and social history.
African Americans had faced segregation, disenfranchisement, violence, and discrimination for generations. Activists increasingly challenged the system through litigation, boycotts, demonstrations, voter-registration drives, and grassroots organizing.
Brown v. Board of Education in 1954 declared state-mandated racial segregation in public schools unconstitutional.
The Montgomery Bus Boycott began in 1955.
The movement expanded through the 1960s, involving figures such as Martin Luther King Jr., organizations such as the NAACP and SNCC, and thousands of local activists.
The Civil Rights Act of 1964 prohibited discrimination in public accommodations and employment and became one of the most significant civil-rights laws since Reconstruction.
The Voting Rights Act of 1965 targeted discriminatory voting practices such as literacy tests and strengthened federal protection of voting rights.
The period also brought major changes in women’s rights, higher education, popular culture, environmentalism, and attitudes toward government.
Yet the country remained deeply divided over Vietnam, race, economics, foreign policy, and social change.
16. Late Twentieth-Century America, 1970–2000
The 1970s brought economic difficulties, including inflation and energy crises.
The political scandal surrounding Watergate led to President Richard Nixon’s resignation in 1974.
During the 1980s, the Reagan administration emphasized tax reductions, deregulation, increased defense spending, and a more conservative political approach.
The United States also experienced major changes in its industrial economy. Manufacturing declined in some regions while services, finance, information technology, and other sectors expanded.
The Cold War ended with the collapse of Soviet communism around 1989–1991.
Meanwhile, computers became increasingly important to business, education, government, and everyday life.
The expansion of the Internet during the 1990s created the foundation for the digital economy that would dominate the next century.
American culture was also becoming increasingly global. Immigration reshaped metropolitan areas, food, music, business, and politics.
By 2000, the United States had moved from an industrial economy toward one increasingly driven by information, services, technology, finance, and global networks.
17. America Since 2000
The twenty-first century began with an event that dramatically changed American foreign policy and domestic security.
On September 11, 2001, terrorists attacked the World Trade Center in New York and the Pentagon near Washington, D.C. The attacks killed thousands of people and led to a major expansion of national-security policies.
The United States invaded Afghanistan later in 2001. The Iraq War began in 2003.
The wars became lengthy and controversial, while the country faced continuing debate about terrorism, surveillance, civil liberties, immigration, military intervention, and the proper scope of executive power.
The financial crisis of 2007–2009 created another major turning point. Banks and financial institutions came under severe pressure, unemployment rose, housing markets collapsed in many areas, and the federal government intervened to stabilize the financial system and broader economy.
In 2008, Barack Obama was elected president, becoming the first African American president of the United States.
The 2010s saw rapid expansion of smartphones, social media, cloud computing, streaming entertainment, artificial intelligence research, and the broader digital economy.
Political polarization also became increasingly prominent.
The 2020 COVID-19 pandemic created another major disruption. It affected public health, schools, workplaces, supply chains, travel, and daily life. The 2020 Census counted 331,449,281 residents in the United States, a 7.4 percent increase from 2010.
The 2020 presidential election was followed by intense political conflict. On January 6, 2021, a mob attacked the U.S. Capitol as Congress was meeting to certify the electoral result.
The Biden administration then governed from 2021 to 2025.
In January 2025, Donald Trump was inaugurated for another presidential term, marking a return to the presidency after his 2017–2021 administration. The White House records his January 20, 2025 inauguration and identifies that date as the beginning of his second administration.
By the mid-2020s, American society was being shaped by artificial intelligence, social media, demographic change, geopolitical competition, immigration debates, economic inequality, climate concerns, technological disruption, and continued disagreements over the role of government.
History has not produced a single final version of the United States. The country continues to change.
18. American History Timeline: Major Turning Points at a Glance
c. 15,000+ years ago — Indigenous populations established enduring societies across North America; the exact history of earlier migrations remains an area of archaeological research.
1565 — St. Augustine founded by the Spanish in Florida.
1580s — English colonization attempts include Roanoke.
1607 — Jamestown established.
1620 — Plymouth Colony established.
1754–1763 — French and Indian War.
1765 — Stamp Act intensifies colonial resistance.
1770 — Boston Massacre.
1773 — Boston Tea Party.
1775 — Battles of Lexington and Concord begin the Revolutionary War.
1776 — Declaration of Independence adopted.
1781 — British surrender at Yorktown.
1783 — Treaty of Paris formally ends the Revolutionary War.
1787 — Constitution signed.
1789 — Washington becomes first president.
1791 — Bill of Rights ratified.
1803 — Louisiana Purchase.
1812–1815 — War of 1812.
1830 — Indian Removal Act.
1838 — Cherokee removal intensifies, producing the Trail of Tears.
1846–1848 — Mexican-American War.
1850s — Sectional conflict over slavery intensifies.
1861–1865 — Civil War.
1863 — Emancipation Proclamation takes effect.
1865 — 13th Amendment abolishes slavery.
1868 — 14th Amendment establishes constitutional citizenship protections.
1870 — 15th Amendment protects voting rights regardless of race or previous condition of servitude.
1870s–1900 — Gilded Age and rapid industrialization.
1890s–1910s — Progressive reform movements expand.
1914–1918 — World War I.
1917 — United States enters World War I.
1920 — 19th Amendment ratified.
1929 — Stock-market crash and beginning of Great Depression.
1933 — Roosevelt begins New Deal presidency.
1941 — Pearl Harbor attack brings United States into World War II.
1945 — World War II ends; United States emerges as a global superpower.
1949 — NATO established.
1954 — Brown v. Board of Education.
1955–1956 — Montgomery Bus Boycott.
1964 — Civil Rights Act.
1965 — Voting Rights Act.
1969 — Apollo 11 lands humans on the Moon.
1974 — Richard Nixon resigns amid Watergate.
1989–1991 — Cold War ends and Soviet Union collapses.
1990s — Internet expands into mass use.
2001 — September 11 attacks.
2003 — Iraq War begins.
2007–2009 — Global financial crisis.
2008 — Barack Obama elected president.
2020 — COVID-19 pandemic and national disruption.
2021 — January 6 attack on the U.S. Capitol.
2025 — Donald Trump begins a second presidential administration.
2020s — Artificial intelligence, digital platforms, geopolitical competition, demographic change, and political polarization become major forces shaping American society.
19. Myths and Misconceptions
Myth: American history began with Christopher Columbus in 1492.
What the Evidence Suggests:
Human societies existed throughout the Americas for thousands of years before European arrival. Indigenous peoples developed diverse political, economic, agricultural, and cultural systems long before colonial America emerged.
Myth: The American Revolution was simply Americans fighting for freedom from Britain.
What the Evidence Suggests:
The Revolution involved questions of taxation, representation, imperial authority, political rights, economic interests, and sovereignty. Different groups—including Loyalists, Patriots, enslaved people, Indigenous nations, and women—experienced the conflict differently.
Myth: The Civil War was only about states’ rights.
What the Evidence Suggests:
States’ rights was a major constitutional argument used during the crisis, but the specific issue at its center was slavery. The secession crisis and Confederate political documents make slavery central to the conflict.
Myth: The Emancipation Proclamation immediately ended slavery everywhere in America.
What the Evidence Suggests:
The proclamation applied to enslaved people in areas of the Confederacy in rebellion and did not itself abolish slavery nationwide. The 13th Amendment provided constitutional abolition in 1865.
Myth: The Civil Rights Movement was the work of a handful of famous leaders.
What the Evidence Suggests:
National figures became symbols of the movement, but the movement depended on thousands of local activists, organizers, students, churches, lawyers, journalists, community leaders, and ordinary citizens.
FAQ
When does American history begin?
American history, understood broadly, begins thousands of years before European colonization with the Indigenous peoples who inhabited North America. The history of the United States as an independent nation begins in the late eighteenth century.
What is the most important date in American history?
There is no single correct answer. July 4, 1776, is central because the Declaration of Independence was adopted, while 1787, 1789, 1861, 1865, 1964, 1965, 1941, and 2001 represent other major turning points.
Why did the American Revolution happen?
The Revolution developed from escalating disputes between Britain and its North American colonies over taxation, representation, imperial authority, economic regulation, and political rights. Fighting began in 1775 and independence was formally declared in 1776.
Why did the Civil War happen?
The Civil War resulted from a long political crisis centered on slavery, especially whether slavery would expand into western territories and states. Conflicts over federal authority, secession, and the political future of the Union became inseparable from the slavery question.
When did slavery end in the United States?
Slavery was constitutionally abolished when the 13th Amendment was ratified on December 6, 1865.
What was the Reconstruction Era?
Reconstruction was the period after the Civil War during which the United States attempted to rebuild the former Confederacy, restore the Union, and establish new legal and political rights for formerly enslaved people.
What changed during the Civil Rights Movement?
The movement challenged legal segregation and racial discrimination and helped produce major federal legislation, particularly the Civil Rights Act of 1964 and Voting Rights Act of 1965.
Is American history finished?
No. A historical timeline can end at the present only as a practical editorial decision. Events after 2025 will continue to alter how the twenty-first century is understood.
SOURCES & REFERENCES
- Library of Congress — U.S. History Primary Source Timeline
Provides a major periodization of American history from colonial settlement through the postwar era. - National Archives — Milestone Documents
Primary documents covering the Revolution, Constitution, Civil War, Reconstruction, and later American history. - National Archives — America’s Founding Documents
Primary-source background for the Declaration of Independence, Constitution, and Bill of Rights. - National Park Service — Native Americans / Archaeology
Background on Indigenous societies and the archaeological record of early North America. - Smithsonian Institution — Timeline of Native Americans
Reference chronology covering Native American history before 1492 through the modern period. - National Park Service — Trail of Tears National Historic Trail
Historical documentation concerning the Indian Removal Act and Cherokee removal. - Library of Congress — American Revolution
Chronology of major events from imperial crisis through independence. - National Archives — Civil War Amendments and Civil Rights Documents
Primary-source documentation for the 13th, 14th, 15th Amendments and later civil-rights legislation. - Library of Congress — Great Depression and World War II
Historical background on the Depression, New Deal, and U.S. participation in World War II. - NASA — Apollo 11
Primary institutional reference for the 1969 Moon landing.
