Francis Marion (c. 1732 – February 27, 1795) is a military officer who serves in the American Revolutionary War.

Acting with Continental Army and South Carolina militia commissions, he is a persistent adversary of the British in their occupation of South Carolina in 1780 and 1781, even after the Continental Army is driven out of the state in the Battle of Camden.

Due to his irregular methods of warfare, he is considered one of the fathers of modern guerrilla warfare, and is credited in the lineage of the United States Army Rangers.

He is known as the Swamp Fox.