After completing the ROTC program at the University of Illinois, Reginald Harmon was commissioned as a second lieutenant in the Field Artillery Reserve.[3]: 5 In October 1940, Mr. Harmon was called to active duty at Wright Field, Dayton, Ohio, as a major in the Officers' Reserve Corp of the Army.[3]: 5 Mr. Harmon represented the U.S. Government in an industrial expansion program to meet the growing needs of the Army Air Corps during World War II from 1940 to 1945.[3]: 5 [4]: 5 For his work in opening new supply sources for the production of aircraft, Mr. Harmon received the Legion of Merit.[3]: 5 Between 1945 and 1948, he served as the Judge Advocate of the Air Material Command where he provided legal representation for the Air Force in a billion dollar procurement program.[3]: 5 During this period, Mr. Harmon left the Reserve Corp for the regular component of the military.[3]: 5 On September 8, 1948, Mr. Harmon became the first Judge Advocate General of the United States Air Force and was promoted to the rank of Major General.[3]: 5 [4]: 4 He was reappointed as the Judge Advocate General in 1952 and 1956.[3]: 5 [4]: 5