American Revolutionary War: Three thousand British soldiers under the command of Lieutenant Colonel Archibald Campbell capture Savannah, Georgia.

The Capture of Savannah, or sometimes the First Battle of Savannah (because of the siege of 1779), or the Battle of Brewton Hill, was an American Revolutionary War battle fought on December 29, 1778 pitting local American Patriot militia and Continental Army units, holding the city, against a British invasion force under the command of Lieutenant Colonel Archibald Campbell. The British capture of the city led to an extended occupation and was the opening move in the British southern strategy to regain control of the rebellious Southern provinces by appealing to the relatively strong Loyalist sentiment there.

General Sir Henry Clinton, the Commander-in-Chief, North America, dispatched Campbell and a 3,100-strong force from New York City to capture Savannah, and begin the process of returning Georgia to British control. He was to be assisted by troops under the command of Brigadier General Augustine Prevost that were marching up from Saint Augustine in East Florida. After landing near Savannah on December 23, Campbell assessed the American defenses, which were comparatively weak, and decided to attack without waiting for Prevost. Taking advantage of local assistance he flanked the American position outside the city, captured a large portion of Major General Robert Howe's army, and drove the remnants to retreat into South Carolina.

Campbell and Prevost followed up the victory with the capture of Sunbury and an expedition to Augusta. The latter was only occupied by Campbell for a few weeks before he retreated to Savannah, citing insufficient Loyalist and Native American support and the threat of Patriot forces across the Savannah River in South Carolina. The British held off a Franco-American siege in 1779, and held the city until late in the war.

The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, secured a United States of America independent from Great Britain. Fighting began on April 19, 1775, followed by the Declaration of Independence on July 4, 1776. The American Patriots were supported by France and Spain, conflict taking place in North America, the Caribbean, and Atlantic Ocean. It ended on September 3, 1783 when Britain accepted American independence in the Treaty of Paris, while the Treaties of Versailles resolved separate conflicts with France and Spain.Established by Royal charter in the 17th and 18th centuries, the American colonies were largely autonomous in domestic affairs and commercially prosperous, trading with Britain and its Caribbean colonies, as well as other European powers via their Caribbean entrepôts. After British victory in the Seven Years' War in 1763, tensions arose over trade, colonial policy in the Northwest Territory and taxation measures, including the Stamp Act and Townshend Acts. Colonial opposition led to the 1770 Boston Massacre and 1773 Boston Tea Party, with Parliament responding by imposing the so-called Intolerable Acts.

On September 5, 1774, the First Continental Congress drafted a Petition to the King and organized a boycott of British goods. Despite attempts to achieve a peaceful solution, fighting began with the Battle of Lexington on April 19, 1775 and in June Congress authorized George Washington to create a Continental Army. Although the "coercion policy" advocated by the North ministry was opposed by a faction within Parliament, both sides increasingly viewed conflict as inevitable. The Olive Branch Petition sent by Congress to George III in July 1775 was rejected and in August Parliament declared the colonies to be in a state of rebellion.

Following the loss of Boston in March 1776, Sir William Howe, the new British commander-in-chief, launched the New York and New Jersey campaign. He captured New York City in November, before Washington won small but significant victories at Trenton and Princeton, which restored Patriot confidence. In summer 1777, Howe succeeded in taking Philadelphia, but in October a separate force under John Burgoyne was forced to surrender at Saratoga. This victory was crucial in convincing powers like France and Spain an independent United States was a viable entity.

France provided the US informal economic and military support from the beginning of the rebellion, and after Saratoga the two countries signed a commercial agreement and a Treaty of Alliance in February 1778. In return for a guarantee of independence, Congress joined France in its global war with Britain and agreed to defend the French West Indies. Spain also allied with France against Britain in the Treaty of Aranjuez (1779), though it did not formally ally with the Americans. Nevertheless, access to ports in Spanish Louisiana allowed the Patriots to import arms and supplies, while the Spanish Gulf Coast campaign deprived the Royal Navy of key bases in the south.

This undermined the 1778 strategy devised by Howe's replacement, Sir Henry Clinton, which took the war into the Southern United States. Despite some initial success, by September 1781 Cornwallis was besieged by a Franco-American force in Yorktown. After an attempt to resupply the garrison failed, Cornwallis surrendered in October, and although the British wars with France and Spain continued for another two years, this ended fighting in North America. In April 1782, the North ministry was replaced by a new British government which accepted American independence and began negotiating the Treaty of Paris, ratified on September 3, 1783.