By 1778, the war had turned into a stalemate. Although some in Britain, including Prime Minister Lord North, wanted peace, King George III demanded that the colonies be brought to obedience. To break the deadlock, the British revised their strategy and turned their attention to the southern colonies, where they could expect more support from Loyalists. The southern colonies soon became the center of the fighting. The southern strategy brought the British success at first, but thanks to the leadership of George Washington and General Nathanael Greene and the crucial assistance of French forces, the Continental Army defeated the British at Yorktown, effectively ending further large-scale operations during the war.