Private Amberger was a member of Company E, 2nd Battalion, 5th Infantry Regimental Combat Team. He was Killed in Action while fighting the enemy near Muchon-ni, South Korea, on 7 August 1950, his first day in combat.

Amberger 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.