By late 1779, two major British strategic efforts had failed. An army invading from
Quebec under
John Burgoyne had surrendered to the Americans under
Horatio Gates at the
Battles of Saratoga, which inspired both the
Kingdom of France and
Spain to declare war on
Great Britain in support of the Americans. Meanwhile, a strategic effort led by
Sir William Howe to capture the Revolutionaries' capital of
Philadelphia had met with limited success. Having replaced his superior as Commander-in-Chief of the American Station,
Sir Henry Clinton withdrew all his forces back to
New York City to reinforce the city against a possible Franco-U.S. attack. Stymied by the
Fabian strategy adopted by Continental general
George Washington and, under increasing political pressure to deliver victory, the British turned to launching their
"Southern Strategy" to force a capitulation of the Americans. The British were persuaded that there was a strong
Loyalist sentiment in the South, where major planters and merchants had a variety of economic and familial ties with Great Britain. It was expected that these Loyalists would rise against the American
Patriots in large numbers. The opening British action was the
Capture of Savannah,
Georgia in December 1778. After repulsing an
assault on Savannah by a combined Franco-American force in October 1779, the British planned to capture
Charleston, South Carolina, intending to use the city as a base for further operations in the southern colonies. Clinton evacuated
Newport, Rhode Island, in October 1779, and left the substantial garrison of
New York City under the command of
Wilhelm von Knyphausen. In December, the day after Christmas 1779, Clinton and his
second-in-command,
Charles Cornwallis, sailed southward with 8,500 troops and 5,000 sailors on 90 troopships and 14 warships. After a very stormy voyage, the fleet anchored in the Savannah River on 1 February 1780. By 12 February, Clinton had landed his army 30 miles south of Charleston on
Simmons Island. By 24 February, the British had crossed the
Stono River onto
James Island, and by 10 March, Lord Cornwallis had made it to the mainland. By 22 March, they had advanced to
Middleton Place and
Drayton Hall, and on 29 March 1780, crossed the
Ashley River. Clinton had issued the
Philipsburg Proclamation in 1779, promising freedom for
slaves owned by Patriots who escaped to British lines and aided their cause. Slaves left both the city and countryside around Charleston to join the British around the city. Among those former slaves, known as
Black Loyalists, evacuated by the British after the war was
John Kizell, who had been captured as a child from the area of
Sierra Leone and transported to South Carolina. He eventually returned to
Sierra Leone and aided the
American Colonization Society. ==Siege==