Private Grogan was a member of the 27th Infantry Regiment, 25th Infantry Division. He was Killed in Action while fighting the enemy during "Operation Courageous" south of the Imjin River in South Korea on 22 March 1951.

Grogan 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.