During 1942, Ingles was appointed the chief of staff of the Caribbean Defense Command, where he served under the command of Lieutenant General
Frank M. Andrews. Ingles was appointed commanding general of the Panama Mobile Force in the same year. He served in this capacity until 1943 and was decorated with the
Army Distinguished Service Medal for his service. In 1943, Major General Ingles served a brief period as a deputy commander in chief of the
U.S. European Theater of Operations and on July 1, 1943, he succeeded Major General
Dawson Olmstead as a
Chief Signal Officer of the U.S. Army. Under his tenure, the Signal Corps grew into an important part of the American war effort. After the war, the Signal Corps kept abreast of new technology and made first
radar contact with the Earth's
Moon during
Project Diana and broke a speed record for fastest
radioteletype in April 1945. ==Postwar life==