Private Denne was a Light Weapons Infantryman with Company E, 2nd Battalion, 35th Infantry Regiment, 25th Infantry Division. He was Killed in Action while fighting the enemy during "Operation Commando" near Hagamnyong, North Korea, on 3 October 1951.

Denne 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.