In the early morning of 13 October 1812, American troops under Major-General Stephen Van Rensellaer crossed the Niagara River and took possession of Queenston Heights. Major-General Isaac Brock hurried from Fort George to lead a small force against the invaders and was killed in an attempt to regain the heights. In the afternoon, Major-General Roger Hale Sheaffe with his force of British regulars, militia and Indians from Fort George, strengthened by reinforcements from Chippawa, took the hill from the west flank, capturing 958 prisoners. This celebrated victory ended the American offensive of 1812.