After some training with the RAF, and an interim post ferrying aircraft to France, Vaughn was posted in May 1918 to No. 84 Squadron RAF, based in Bertangles and commanded by Sholto Douglas. He was attached to "B" flight, led by Hugh "Dingbat" Saunders, the sometimes-wingman to RAF ace Andrew Beauchamp-Proctor, all three pilots flying the Royal Aircraft Factory S.E.5a. Vaughn claimed seven air victories in his time with 84 Squadron. In August 1918, Vaughn was transferred to the 17th Aero Squadron, United States Air Service, where he flew the Sopwith Camel, claiming another six victories. Vaughn was America's second-ranking Air Service ace to survive the war. He is credited with downing four German planes destroyed, seven shared destroyed, one kite balloon destroyed and one aircraft "out of control". One of the German pilots he shot down was Friedrich T. Noltenius, a 21-victory ace, on September 22, 1918. In November 1919, Vaughn was presented with the Distinguished Flying Cross by the Prince of Wales aboard H.M.S. Renown, anchored in New York harbor. Vaughn's memoirs were published in a book called: War Flying in France, edited and annotated by Marvin L. Skelton.
Vaughn died of a brain tumor while on Staten Island, on 31 July 1989. He is buried in Rye, New York. Vaughn's military records, award certificate of military honors and uniform are now in the in Saratoga Springs, N.Y.
Citations
Distinguished Service Cross
"The Distinguished Service Cross is presented to George Augustus Vaughn, First Lieutenant, U.S. Army, for extraordinary heroism in action near Cambrai, France, September 22, 1918. Lieutenant Vaughn while leading an offensive flight patrol sighted 18 enemy Fokkers about to attack a group of five allied planes flying at a low level. Although outnumbered nearly 5 to 1, he attacked the enemy group, personally shot down two enemy planes, the remaining three planes of his group shooting down two more. His courage and daring enabled the group of allied planes to escape. Again on September 28, 1918, he alone attacked an enemy advance plane which was supported by seven Fokkers and shot the advance plane down in flames." DSC citation, General Orders No. 60, W.D., 1920
Distinguished Flying Cross
"For conspicuous bravery in attacking enemy aircraft. On 23 August 1918, while on offensive patrol, he attacked an enemy kite balloon near Ham. Closing to almost point blank range, he fired upon it so that it burst into flames and was destroyed. Shortly afterwards, he observed an enemy two-seater near Maricourt. He attacked it, shooting it down from a height of 500 feet so that it was completely crashed. On 22 August, he drove to its destruction, an enemy two-seater near Villers Carbonnel. In all, he has accounted for six enemy aircraft, five machines destroyed and one driven down completely out of control, and one kite balloon." DFC citation