Burgoyne's army traveled up the lake and occupied the undefended Fort Crown Point by June 30. The screening activities of Burgoyne's Indian support were highly effective at keeping the Americans from learning the details of his movements. General Arthur St. Clair, who had been left in command of Fort Ticonderoga and its surrounding defenses with a garrison of about 3,000 regulars and militia, had no idea on July 1 of the full strength of Burgoyne's army, large elements of which were then just away. St. Clair had been ordered by General Schuyler to hold out as long as possible, and had planned two avenues of retreat.