John was born on the 3rd of April, 1929, in Worthington, Kentucky, and sadly there isn't much information that is available about John. We know he enlisted in the US Army and was deployed to Korea, where his actions earned him the Medal of Honor, posthumously. The citation reads:

Cpl. Collier, Company C, distinguished himself by conspicuous gallantry and intrepidity above and beyond the call of duty in action. While engaged in an assault on a strategic ridge strongly defended by a fanatical enemy, the leading elements of his company encountered intense automatic weapons and grenade fire. Cpl. Collier and 3 comrades volunteered and moved forward to neutralize an enemy machine gun position which was hampering the company's advance, but they were twice repulsed. On the third attempt, Cpl. Collier, despite heavy enemy fire and grenade barrages, moved to an exposed position ahead of his comrades, assaulted and destroyed the machine gun nest, killing at least 4 enemy soldiers. As he returned down the rocky, fire-swept hill and joined his squad, an enemy grenade landed in their midst. Shouting a warning to his comrades, he, selflessly and unhesitatingly, threw himself upon the grenade and smothered its explosion with his body. This intrepid action saved his comrades from death or injury. Cpl. Collier's supreme, personal bravery, consummate gallantry, and noble self-sacrifice reflect untold glory upon himself and uphold the honored traditions of the military service.

John Walton Collier is buried in Arlington National Cemetery: section 12, site 4637.