As a Lieutenant (J.G.) USN(R), during WWII, he was awarded the Navy Cross.
To All Who Shall See These Presents Greeting: This is to Certify that The President of the United States of America Takes Pleasure in Presenting THE NAVY CROSS to Citation: The President of the United States takes pleasure in presenting the Navy Cross to Jack P. Barnum, Lieutenant, Junior Grade, U.S. Navy (Reserve), for extraordinary heroism in operations against the enemy while serving as Pilot of a carrier- based Navy Torpedo Plane in Torpedo Squadron EIGHT (VT-8), embarked from the U.S.S. SARATOGA (CV-3), during action against enemy Japanese forces in the Solomon Islands Campaign on 24 August 1942. In an unsupported aerial torpedo raid against a Japanese task force, Lieutenant, Junior Grade, Barnum pressed home his attack through a bursting hail of fire from hostile anti-aircraft batteries. He contributed to the relentless fighting spirit and aggressive courage which enabled his squadron to score one certain hit and two estimated hits on an enemy aircraft carrier. His superb airmanship and unyielding devotion to duty aided greatly in the defeat of a persistent foe and were in keeping with the highest traditions of the United States Naval Service.
Bureau of Naval Personnel Information Bulletin No. 313 (April 1943) Born: April 13, 1916 at Youngstown, Ohio
Home Town: Poland, Ohio