Ingalls was attached to the British 213 Squadron and flew Sopwith Camels in attacks on German submarine bases.On August 11, 1918, Ingalls and his flight leader, Colin Peter Brown, shot down a German observation plane behind enemy lines.[citation needed] On 21 August, Ingalls shared a win over an LVG two-seater with Brown and fellow ace George Stacey Hodson.[citation needed] On his way back to base on September 24, 1918, he spotted a German observation plane, which he and Hodson shot down.[citation needed]He was credited with down six enemy aircraft making him an "ace"[10] Ingalls returned to Yale and received an LLD from Harvard in 1923.He was a good friend of Jack Towers, who recommended Ingalls for the job of Assistant Secretary of the Navy (AIR).As Assistant Secretary, he tripled the number of naval aircraft and pushed for a fully deployable carrier task force.After the attack on Pearl Harbor by the Japanese, he helped develop the Naval Air Station at Honolulu, and ended up reporting for duty.On his return to Ohio, he became a director of Pan Am World Airways and managed Robert A. Taft's campaign to be the Republican nominee for president in 1952.Ingalls was a friend of the aviator Charles Lindbergh, whom he helped solve navigation and communication problems in charting new air routes to the east for Pan Am.He was a director of the Cleveland Trust Company, director of South Eleuthera Properties, Vice President of Virginia Hot Springs, Inc., President of the Central Eyebank for Sight Restoration, trustee of Laurel School and an honorary trustee of the Young Men's Christian Association.