During Operation Harvest Moon, Barnum would be awarded the Medal of Honor for his actions on December 18, 1965 — for "conspicuous gallantry and intrepidity at the risk of his life above and beyond the call of duty".
Barnum's exceptional bravery during Operation Harvest Moon on December 18, 1965, would lead to him being awarded the Medal of Honor for his extraordinary heroism in a perilous situation.