Private Ackermann was a member of the 160th Infantry Regiment, 40th Infantry Division. He was Killed in Action while fighting the enemy near Kumsong, North Korea, on 16 April 1952.

Ackermann 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 and the Republic of Korea War Service Medal.