Key facts of the era
Key Events
Who Was in Power
America’s story is yours to explore.
Scroll the timeline, open an event, and discover the people and turning points that shaped the United States.
Scroll the timeline, open an event, and discover the people and turning points that shaped the United States.
Explore the presidents of the United States, their terms in office, party affiliations, and succession.
A Journey Through the Ages
The history of the United States begins long before the nation itself, with the diverse Indigenous peoples who shaped North America for thousands of years.
European colonization, forced migration, and Atlantic slavery transformed the continent. Thirteen British colonies later declared independence and built a constitutional republic.
Expansion brought enormous growth alongside Indigenous dispossession and deepening conflict over slavery, culminating in Civil War and emancipation.
Industrialization, immigration, reform, depression, and two world wars remade American life and the nation’s place in the world.
Modern America continues to be shaped by civil-rights movements, global power, migration, technology, and an unfinished debate over the meaning of freedom and democracy.
Before 1492
Native nations built distinct cultures, trade networks, governments, and cities across the continent.
Long before the United States existed, Indigenous peoples shaped the continent through agriculture, diplomacy, commerce, migration, and conflict. Their histories are foundational to the American story and continue in sovereign tribal nations today.
The ancestors of today's Native nations settled the Americas at least 15,000 years ago.
Clovis and Folsom toolmakers hunted mammoth and bison across the continent.
Poverty Point, Adena and Hopewell peoples raised vast earthworks for ceremony and trade.
The Haudenosaunee united five nations under the Great Law of Peace.
1492–1763
Colonization created new settlements and economies while bringing epidemic disease, warfare, dispossession, and slavery.
European colonization unfolded within an already populated continent. Competing empires, Native nations, settlers, and enslaved Africans created a contested Atlantic world whose institutions and inequalities deeply shaped the future United States.
Columbus, Ponce de León, De Soto and Coronado opened a century of Spanish conquest and settlement.
From Plymouth to Massachusetts Bay and Pennsylvania, settlers built self-governing colonies on the Atlantic coast.
Enslaved Africans arrived in Virginia in 1619, and racial slavery hardened into law over the next century.
Native resistance and imperial rivalry erupted in King Philip's War and the French and Indian War.
1763–1824
Revolutionary ideals produced a new nation, even as citizenship and freedom remained sharply limited.
War with Britain transformed colonies into an independent republic. The Constitution created an enduring federal framework, but the new political order protected slavery and excluded most people from full participation.
Taxes like the Stamp Act and clashes in Boston turned colonial protest into open rebellion.
From Lexington to Yorktown, Continental forces with French help won independence from Britain.
The Constitution of 1787 and the Bill of Rights created a federal republic that endures today.
The Louisiana Purchase and the Lewis and Clark expedition doubled the nation and pointed it west.
1824–1877
Expansion and sectional crisis culminated in civil war, emancipation, and a contested reconstruction.
Westward expansion displaced Native peoples and repeatedly reopened the question of slavery. Civil War preserved the Union and destroyed legal slavery; Reconstruction briefly expanded biracial democracy before violent resistance and political retreat narrowed its gains.
The Indian Removal Act and the Trail of Tears forced Native nations west of the Mississippi.
Texas, Oregon and the Mexican Cession carried the nation to the Pacific.
Compromises failed as Kansas bled and the Dred Scott decision deepened sectional division.
The 13th, 14th and 15th Amendments ended slavery and promised citizenship and the vote.
1877–1945
The United States became an urban industrial power and emerged from two world wars with unprecedented influence.
Railroads, corporations, immigration, and urbanization remade American life. Reform movements challenged concentrated power and exclusion, while depression expanded the federal role. Victory in World War II left the United States a global superpower.
Railroads, steel and corporations remade the economy, sparking labor unrest and antitrust laws.
Millions of newcomers arrived through New York Harbor, transforming American cities.
Reformers won an income tax, direct election of senators and women's suffrage.
The 1929 crash brought mass unemployment, and the New Deal expanded the federal role.
1945–Present
Postwar prosperity and global leadership unfolded alongside movements demanding fuller equality and democracy.
The modern United States has been shaped by the Cold War, civil-rights struggles, immigration, globalization, terrorism, digital technology, and intense debates over the meaning of citizenship and democratic government.
From the Marshall Plan to the Cuban Missile Crisis, rivalry with the Soviet Union shaped four decades.
Brown v. Board, Montgomery and Selma led to landmark civil- and voting-rights laws.
Assassinations, Vietnam and Watergate shook public faith in government.
The September 11 attacks, the 2008 financial crisis and the COVID-19 pandemic tested the nation.
From Thirteen States to Fifty, 1783 – 1959
From a strip of former colonies along the Atlantic to a union of fifty states. Watch the borders move as land was purchased, ceded, annexed and taken — and see when each territory became a state.
Each year shows the map as of December 31. Historical state and territorial outlines come from the Newberry Library’s Atlas of Historical County Boundaries, converted to SVG; muted outlines show today’s fifty states for reference, and Alaska and Hawaii appear as repositioned insets. The map covers the land of today’s fifty states, not all U.S. overseas possessions, and small boundary details are generalized.
These are governmental boundaries and claims, not a map of settlement or uncontested control. Indigenous nations held lands and sovereignty across these regions; U.S. expansion involved dispossession, warfare and forced removal. Hatching marks separate republics and disputed claims. Civil War colors describe each state’s alignment, not front lines; Indian Territory contained divided nations and is shown as territory.
2nd President of the United States
A leader of American independence whose presidency confronted conflict with France and intense domestic partisan division.
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United States history has left a complex constitutional, cultural, social, and global legacy. Its ideals have inspired generations, while the gap between those ideals and lived reality continues to drive change.
American music, film, literature, technology, and political ideas have circulated worldwide, creating influence as well as debate about power and cultural exchange.
The Constitution created a durable federal system built around divided powers, representative government, and amendment. Its interpretation remains a central arena of American public life.
Abolition, women’s suffrage, labor organizing, civil rights, disability rights, and other movements repeatedly expanded who could claim the nation’s promises of liberty and equality.
The legacies of Indigenous dispossession, slavery, immigration, expansion, war, and reform still shape institutions and communities. American history remains a living argument about the country it should become.
The Immigration and Nationality Act of 1965 ended the national-origins quota system, prioritizing family ties and certain skills. It helped reshape migration to the United States, adding new chapters to the country’s long debate over opportunity and belonging.
National Archives: Immigration Act of 1965Native nations remain active governments. The Indian Self-Determination and Education Assistance Act of 1975 enabled tribes to administer programs previously run by federal agencies, strengthening tribal control over services and community priorities.
Indian Affairs: Tribal self-determinationThe Morrill Act of 1862 supported land-grant colleges teaching agriculture and engineering, broadening access to higher education. That expansion also depended on land taken from Native communities, linking a lasting educational achievement to dispossession.
National Archives: Morrill ActApollo 11 landed humans on the Moon in July 1969. Beyond the first footsteps, the mission returned lunar samples and deployed scientific instruments, demonstrating how public investment, engineering, and exploration could extend human knowledge beyond Earth.
NASA: Apollo 11 mission overviewThe timeline draws on national archives, museum collections, reference works and survey histories of the United States. Linked collections are starting points for further reading and verification, not proof that every claim has been independently checked.
Every event and every president has its own sources. See Sources & Further Reading in each timeline entry and president profile.
History is connected. Explore the bigger picture.
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Travel through centuries, discover turning points, and understand how historical events unfold and connect.
Explore how borders, civilizations, populations, trade routes, beliefs, and spheres of influence have changed over time.
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Explore connections between countries, empires, civilizations, and historical themes to better understand cause and consequence.
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