Sergeant Alaniz was a member of the 23rd Infantry Regiment, 2nd Infantry Division. He was Killed in Action while fighting the enemy on "Old Baldy" near Chorwon, North Korea, on 17 July 1952.

Alaniz 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.