George Rogers Clark moved from Virginia to Kentucky in 1775. He organized and lead Kentucky militiamen in defense of their settlements against the British. Then, deciding to take the war to the British, they attacked posts in Illinois. With fewer than 200 men, he took Kaskaskia without resistance in July 1778. That success convinced French residents of Cahokia and Vincennes to change their allegiance to the Americans. The British commander at Detroit led an expedition that captured Vincennes in December of that year; the following February Clark led a small force that retook Fort Sackville. The recapture of Vincennes was the high point of his military career.