The third British mistake was burning the Stateburg, South Carolina, home and harassing the incapacitated wife of a then inconsequential colonel named Thomas Sumter. Because of his fury over this, Sumter became one of the fiercest and most devastating guerrilla leaders of the war, becoming known as "The Gamecock". The Lowcountry partisans fighting under Marion and Upcountry partisans fighting under Andrew Pickens (whose home had also been burned) plagued the British by using guerilla warfare in the mountains, woods, and swamps of the state.