What General surrendered his whole army of six thousand men?

General William Hull surrendered his entire army of approximately six thousand men during the War of 1812. This occurred on August 16, 1812, when he capitulated to British forces in Detroit after a siege. Hull's decision to surrender was influenced by various factors, including a lack of supplies and reinforcements, as well as the threat posed by Native American allies of the British. This surrender was a significant early setback for the United States in the conflict.