Corporal Foster was a veteran of World War II. In Korea, he was a member of Company L, 3rd Battalion, 5th Infantry Regimental Combat Team. He was Killed in Action while fighting the enemy near Kogan-ni, South Korea, on 9 August 1950.

Foster was awarded the Purple Heart, the Combat Infantryman's Badge, the Korean Service Medal, the United Nations Service Medal, the National Defense Service Medal, the Korean Presidential Unit Citation, the Republic of Korea War Service Medal and the World War II Victory Medal.