Private Johnson was a member of the 5th Cavalry Regiment, 1st Cavalry Division. He was Killed in Action while fighting the enemy in South Korea on 29 January 1951.

Johnson was awarded the Purple Heart, the Combat Infantryman's Badge, the Korean Service Medal, the United Nations Service Medal, the Combat Medical 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.