---
title: "Siege of Yorktown | Honors US History"
description: "Siege of Yorktown: the 1781 Franco-American victory that forced Cornwallis to surrender, turning the Revolutionary War toward American independence."
canonical: "https://fiveable.me/hs-honors-us-history/key-terms/siege-of-yorktown"
type: "key-term"
subject: "Honors US History"
unit: "Unit 3"
---

# Siege of Yorktown | Honors US History

## Definition

The Siege of Yorktown was the 1781 Franco-American campaign that trapped General Cornwallis and forced his surrender. In Honors US History, it is the war’s decisive turning point.

## What It Is

The Siege of Yorktown was the last major military campaign of the American Revolution, fought from September 28 to October 19, 1781. In Honors US History, it is the battle where American and French forces trapped British General Cornwallis on the Virginia coast and forced him to surrender.

What made Yorktown different from earlier fighting was the coordination. George Washington’s army moved south with help from French troops under the Marquis de Lafayette and General Rochambeau, while the French navy blocked the Chesapeake Bay. That meant Cornwallis could not easily escape by sea, and British reinforcements could not get in fast enough.

Yorktown was not just a lucky battlefield win. It was the result of strategy, alliance-building, and timing. By 1781, Britain was stretched across several war theaters and could not fully control the colonies. The American side used that weakness by combining land pressure with French naval power, which turned Cornwallis’s position into a trap.

When Cornwallis surrendered, the war did not end overnight, but the major fighting did. The surrender shocked British politics and boosted the patriot cause in the colonies. More than a dramatic battle, Yorktown showed that the Revolution had moved from rebellion to a real military and diplomatic success.

In a history class, you should think of Yorktown as the point where the war became hard for Britain to continue. It connects battlefield tactics to larger themes like alliance, imperial overreach, and the shift from resistance to independence.

## Why It Matters

Yorktown matters because it ties together the big ideas in the Revolutionary War instead of treating the war like a list of battles. You can see how military strategy, foreign support, and British weakness all came together in one event.

For Honors US History, it is also a clean example of cause and effect. The French Alliance did not just look good on paper, it helped create the conditions for victory. Washington’s army alone could not have trapped Cornwallis the same way, and the French fleet made the escape route disappear.

It also helps explain why the Revolution ended in negotiation instead of endless fighting. After Yorktown, Britain had less reason to keep spending money and soldiers on a war it was struggling to win. That leads directly into the Treaty of Paris 1783 and the formal recognition of American independence.

If you are writing about turning points, Yorktown is one of the strongest choices because it changed both military momentum and political expectations. It shows the Revolution as a war fought on land, at sea, and in diplomacy at the same time.

## Connections

### French Alliance

Yorktown only worked because France supported the American cause with troops, ships, and coordination. The alliance turned the war from a mostly colonial rebellion into an international conflict. At Yorktown, French naval power was what kept Cornwallis from escaping, which makes the alliance more than just background support.

### General Cornwallis

Cornwallis was the British commander whose army got trapped at Yorktown. When you study the siege, you are really studying how his decisions, movements, and inability to break out affected the last phase of the war. His surrender is the event that made Yorktown memorable.

### Treaty of Paris 1783

Yorktown did not officially end the war, but it pushed Britain toward peace talks that eventually produced the Treaty of Paris 1783. If Yorktown is the military turning point, the treaty is the diplomatic finish. The connection helps you track how battlefield defeat led to political recognition.

### [Marquis de Lafayette](/hs-honors-us-history/key-terms/marquis-de-lafayette)

Lafayette helped coordinate American and French efforts in Virginia before the siege, which made Yorktown possible. He is a useful bridge term because he connects French involvement to Washington’s strategy on the ground. In essays, he often appears as proof that the war was supported by more than just colonial militias.

## On the AP Exam

A quiz question may ask you to identify Yorktown as the final major battle of the Revolutionary War or explain why it was a turning point. In a short essay, you might use it as evidence that the American victory depended on both military strategy and French support. If you get a timeline prompt, place it near the end of the war in 1781, after earlier fighting like Trenton, Princeton, and Bunker Hill. For a document-based or source analysis question, look for clues about siege tactics, naval blockade, or Cornwallis’s surrender. The best move is to explain cause and effect, not just name the battle. Say what happened, who worked together, and why it changed Britain’s odds of winning.

## Siege of Yorktown vs Battle of Yorktown

People sometimes say "Battle of Yorktown" when they mean the Siege of Yorktown. The common classroom term is "siege" because the fighting was about surrounding Cornwallis, cutting off escape, and forcing surrender over several weeks. "Battle" is not wrong in a loose sense, but "siege" is more precise for how the event worked.

## Key Takeaways

- The Siege of Yorktown was the last major battle of the American Revolution and ended with Cornwallis’s surrender.
- French naval and military support was a major reason the American side won at Yorktown.
- The siege mattered because it trapped the British army and made continued fighting much less practical for Britain.
- Yorktown did not instantly create peace, but it pushed Britain toward negotiations and the Treaty of Paris 1783.
- In Honors US History, Yorktown is a turning point that connects military strategy, diplomacy, and the growth of American independence.

## FAQs

### What is the Siege of Yorktown in Honors US History?

It was the 1781 campaign where American and French forces trapped British General Cornwallis in Virginia and forced him to surrender. In Honors US History, it is usually taught as the decisive turning point of the Revolutionary War.

### Why was Yorktown a turning point in the Revolutionary War?

Yorktown showed that Britain could be beaten on the ground when American strategy and French sea power worked together. Cornwallis’s surrender damaged British morale and made peace negotiations much more likely.

### Was Yorktown the end of the Revolutionary War?

Not exactly. It ended the major fighting, but formal peace took longer and came with the Treaty of Paris 1783. Yorktown is still treated as the event that made British victory nearly impossible.

### How does the French Alliance connect to Yorktown?

France provided troops and, just as importantly, a fleet that blocked Cornwallis’s escape by sea. Without that alliance, the siege would not have trapped the British army in the same way.

## Related Study Guides

- [3.1 Causes of the American Revolution](/hs-honors-us-history/unit-3/american-revolution/study-guide/4RCI3TdmycAAZrjf)
- [3.2 Key Events and Turning Points of the Revolutionary War](/hs-honors-us-history/unit-3/key-events-turning-points-revolutionary-war/study-guide/IyuFYFwKJYGq2Hqh)

## About This Document

Canonical Fiveable pages are available as Markdown at the same path plus `.md`.

- [llms.txt](https://fiveable.me/llms.txt): index of Fiveable's sections and URL patterns
- [llms-full.txt](https://fiveable.me/llms-full.txt): complete subject and unit listing
- [MCP server](https://fiveable.me/mcp): call Fiveable as tools instead of fetching pages (`https://fiveable.me/api/mcp`)
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