Generate a correct and concise answer for the question based on the words in the context.

Context : Colonel Charles deForest Chandler (December 24, 1878 -- May 18, 1939) was an American military aviator, and the first head of the Aeronautical Division, U.S. Signal Corps that later became the United States Air Force.
Question : Which armed forces utilised the service of Charles deForest Chandler?
United States Air Force