WarRevolution and Independence
The American Revolution
The War of Independence, 1775–1783
April 19, 1775 – September 3, 1783The thirteen colonies, Canada, the trans-Appalachian West, and the Atlantic and Caribbean

The American Revolution was both a political break with Britain and an eight-year war. Colonists who had protested taxes and imperial control in the 1760s took up arms in 1775, declared independence in 1776, and — with decisive help from France — forced Britain to recognize the United States in 1783. The war was also a civil war among colonists, a struggle for survival for Native nations, and, for tens of thousands of enslaved people, a chance at freedom.
Key facts
- Date
- April 19, 1775 – September 3, 1783
- Location
- The thirteen colonies, Canada, the trans-Appalachian West, and the Atlantic and Caribbean
- Dating note
- Fighting began at Lexington and Concord; major combat ended with the surrender at Yorktown in October 1781; the Treaty of Paris formally ended the war.
- Belligerents
- United States and allies France (from 1778), Spain, and the Dutch Republic vs. Great Britain, Loyalists, German auxiliaries, and allied Native nations
- Commanders
- George Washington (Continental Army); Thomas Gage, William Howe, Henry Clinton, Charles Cornwallis (Britain)
- Key battles
- Lexington and Concord (1775), Saratoga (1777), Yorktown (1781)
- Ended by
- Treaty of Paris, signed September 3, 1783
- Black soldiers
- An estimated 5,000–6,000 fought for independence; about 20,000 joined the British
Why it matters
The Revolution created the United States and established the principle that government rests on the consent of the governed. It also left unresolved questions — about slavery, Native sovereignty, and who counted as a citizen — that would shape American history for the next two centuries.
Who fought
The war is often told as Americans against the British, but the sides were more tangled. Colonists divided into Patriots, Loyalists, and a large number who tried to stay out of it. Britain fought with regular troops, German soldiers hired from several states (often called Hessians), Loyalist regiments, and Native allies.
Native nations — more than eighty of them east of the Mississippi — mostly tried to remain neutral at first. Whichever side they chose, most acted for the same purpose: to protect their land and sovereignty. The Haudenosaunee (Iroquois) Confederacy split; the Oneida and many Tuscarora sided with the Americans, sending warriors to fight at Saratoga and men to Valley Forge, while most other Haudenosaunee nations fought with Britain.
African Americans fought on both sides. In November 1775, Virginia’s royal governor, Lord Dunmore, offered freedom to enslaved people who escaped Patriot owners to join the British; an estimated 20,000 Black people eventually fought for Britain, compared with 5,000 to 6,000 who fought for American independence.
Political background
Britain emerged from the Seven Years’ War in 1763 victorious but deep in debt. To raise revenue and govern its enlarged empire, Parliament began enforcing trade duties more strictly and passed new measures: the Currency Act (1764), the Stamp Act (1765), and the Townshend duties (1767). The Proclamation of 1763, issued after Pontiac’s War, forbade colonial settlement west of the Appalachians — angering settlers and land speculators.
Colonists objected that Parliament, in which they had no representatives, had no right to tax them. The Stamp Act crisis united the colonies for the first time: nine sent delegates to a congress in 1765, and boycotts of British goods pushed Parliament to repeal the act. Protest revived against the Townshend duties and again in 1773, when Bostonians destroyed East India Company tea. Parliament responded with the Coercive Acts of 1774, closing Boston’s port and curtailing self-government in Massachusetts. The colonies answered by convening the First Continental Congress.
Major phases
War in New England (1775–1776). British troops marching to seize militia supplies at Concord, Massachusetts, met armed colonists at Lexington on April 19, 1775 — the first battle of the war. The Second Continental Congress created a Continental Army under George Washington, which besieged Boston until the British evacuated in March 1776. An American invasion of Canada failed.
The fight for the middle colonies (1776–1778). After the Declaration of Independence, Britain seized New York City, which it held for the rest of the war, and drove Washington across New Jersey. His surprise victories at Trenton and Princeton kept the army alive. In 1777 the British took Philadelphia, but another British army, invading from Canada, surrendered at Saratoga in October.
A world war (1778–1781). Saratoga convinced France to sign a treaty of alliance with the United States in February 1778; Spain and the Netherlands later went to war with Britain as well. Britain shifted its strategy south, capturing Savannah and Charleston and hoping to rally Loyalists. Brutal partisan fighting followed in the Carolinas.
Yorktown and peace (1781–1783). In 1781 General Charles Cornwallis took his army to Yorktown, Virginia, to build a naval base. A combined French and American army besieged the town while a French fleet blocked rescue by sea. Cornwallis surrendered on October 19, 1781. Negotiations in Paris led to preliminary articles in 1782 and the final treaty in 1783.
Turning points
- Saratoga (October 1777): the surrender of a British army persuaded France that the Americans could win, bringing French money, troops, and naval power into the war.
- The French alliance (February 1778): turned a colonial rebellion into a global war that stretched British resources from the Caribbean to India.
- Yorktown (October 1781): the capture of Cornwallis’s army broke Britain’s will to continue fighting in North America.
Outcome
In the Treaty of Paris, signed September 3, 1783, Britain recognized American independence and accepted boundaries that ran west to the Mississippi River. The treaty also settled fishing rights off Newfoundland, addressed debts owed to British creditors, and promised restitution of property taken from Loyalists. Native nations, including Britain’s allies, were not party to the treaty; Britain ceded land that those nations had never surrendered.
Consequences for American society
Independence created a republic without a king, governed first under the Articles of Confederation and, from 1789, under the Constitution. Revolutionary ideals of liberty and equality encouraged Northern states to begin abolishing slavery and inspired later reform movements, but slavery survived and expanded in the South.
The war’s costs fell unevenly. Tens of thousands of Loyalists left for Canada, Britain, and the Caribbean. Thousands of Black Loyalists who had escaped slavery left with the British, though others were re-enslaved. For Native nations, the Revolution brought heavy losses — of people, villages, and above all land — with long-lasting effects on their lands, cultures, and identities. Even nations that had fought for the United States, such as the Oneida and the Stockbridge Mohicans, saw their lands taken in the decades that followed.
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Check your understanding
Try answering in your own words, then open the answer.
1.Why did the war begin?Show answerHide
Britain emerged from the Seven Years’ War in 1763 victorious but deep in debt. To raise revenue and govern its enlarged empire, Parliament began enforcing trade duties more strictly and passed new measures: the Currency Act (1764), the Stamp Act (1765), and the Townshend duties (1767).From “Political background” above.
2.What were the turning points?Show answerHide
- Saratoga (October 1777): the surrender of a British army persuaded France that the Americans could win, bringing French money, troops, and naval power into the war. - The French alliance (February 1778): turned a colonial rebellion into a global war that stretched British resources from the Caribbean to India. - Yorktown (October 1781): the capture of Cornwallis’s army broke Britain’s will to continue fighting in North America.From “Turning points” above.
3.How did it end?Show answerHide
In the Treaty of Paris, signed September 3, 1783, Britain recognized American independence and accepted boundaries that ran west to the Mississippi River. The treaty also settled fishing rights off Newfoundland, addressed debts owed to British creditors, and promised restitution of property taken from Loyalists.From “Outcome” above.
4.How did it change American society?Show answerHide
Independence created a republic without a king, governed first under the Articles of Confederation and, from 1789, under the Constitution.From “Consequences for American society” above.
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Related History
How this connects to the rest of the atlas.
Events
People
Documents
Institutions
Sources
- 1.Parliamentary Taxation of Colonies, International Trade, and the American Revolution, 1763–1775
U.S. Department of State, Office of the Historian · Institutional · cited for causes: debt, Currency and Stamp Acts, colonial protest
- 2.Proclamation Line of 1763, Quebec Act of 1774 and Westward Expansion
U.S. Department of State, Office of the Historian · Institutional · cited for Pontiac’s War and the Proclamation Line
- 3.French Alliance, French Assistance, and European Diplomacy during the American Revolution, 1778–1782
U.S. Department of State, Office of the Historian · Institutional · cited for Saratoga and the French alliance
- 4.Treaty of Paris, 1783
U.S. Department of State, Office of the Historian · Institutional · cited for peace terms and dates
- 5.April 19, 1775: The First Battle
National Park Service, Minute Man National Historical Park · Institutional · cited for Lexington and Concord
- 6.Yorktown Battlefield — History
National Park Service, Colonial National Historical Park · Institutional · cited for Cornwallis at Yorktown, 1781
- 7.African Americans at the Battle of Guilford Courthouse
National Park Service, Guilford Courthouse National Military Park · Institutional · cited for Dunmore’s Proclamation; estimates of Black soldiers on each side
- 8.Native Americans & the American Revolution
National Archives Museum · Institutional · cited for Native neutrality, motives, and losses
- 9.The Oneida Nation in the American Revolution
National Park Service · Institutional · cited for Oneida service at Saratoga and Valley Forge
Image credits
- Surrender of Lord Cornwallis, John Trumbull, 1820, placed 1826. Via Wikimedia Commons · Public domain · Source
Written for American History Atlas from the sources above. See how entries are researched.
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