Private First Class Renneberg was a member of Company K, 3rd Battalion, 29th Infantry Regimental Combat Team. He was taken Prisoner of War while fighting the enemy near Hadong, South Korea, on 27 July 1950. He was presumed dead on 18 February 1954. His remains were not recovered. His name is inscribed on the Courts of the Missing at the Honolulu Memorial.

Renneberg was awarded the Purple Heart with Oak Leaf Cluster, the Combat Infantryman's Badge, the Prisoner of War Medal, the Korean Service Medal, the United Nations Service Medal, the National Defense Service Medal and the Korean War Service Medal.