Question: What did lieutenant generals Millard Harmon and Frank Maxwell Andrews have in common?

Context paragraphs:
Frank Maxwell Andrews: Lieutenant General Frank Maxwell Andrews (February 3, 1884 – May 3, 1943) was a senior officer of the United States Army and one of the founders of the United States Army Air Forces, which was later to become the United States Air Force.  In leadership positions within the Army Air Corps, he succeeded in advancing progress toward a separate and independent Air Force where predecessors and allies such as Billy Mitchell had failed.  Andrews was the first head of a centralized American air force and the first air officer to serve on the Army's general staff.  In early 1943, he took the place of General Dwight D. Eisenhower as commander of all U.S. troops in the European Theater of Operations.

Lieutenant-general (United Kingdom): Lieutenant general (Lt Gen), formerly more commonly lieutenant-general, is a senior rank in the British Army and the Royal Marines.  It is the equivalent of a multinational three-star rank; some British lieutenant generals sometimes wear three-star insignia, in addition to their standard insignia, when on multinational operations.

John Harmon (coach): John Millard Harmon (May 20, 1895 – October 18, 1974) was an American football, basketball, and baseball coach and college athletics administrator.  He served as the head football coach for the University of Evansville during the 1920s and at Boston University in 1933.  Harmon was also the head basketball coach Evansville from at 1923 to 1920 and at Boston University from 1932 to 1935, compiling a career college basketball record of 74–78.  He was the head baseball coach at Evansville from 1924 to 1927 and at Boston University from 1933 to 1935, tallying a career college baseball mark of 27–52.  He also served as the athletic director at Boston University from 1935 to 1951.

The class the stars fell on: The class the stars fell on is an expression used to describe the United States Military Academy Class of 1915.  In the United States Army, the insignia reserved for generals is one or more stars.  Of the 164 graduates that year, 59 (36%) attained the rank of general, more than any other class in the history of the United States Military Academy at West Point, New York, hence the expression.  Two reached the rank of five-star General of the Army.  There were also 2 four-star generals, 7 three-star lieutenant generals, 24 two-star major generals and 24 one-star brigadier generals.  Dwight D. Eisenhower, one of the five-star generals, went on to become the 34th President of the United States.

List of serving Generals of the Pakistan Army: This is the list of the serving generals of the Pakistan Army.  At present, the army has two full generals, 25 lieutenant generals and 137 major generals, additionally the medical corps has one lieutenant general and 29 major generals.  Barring exceptions of some Major Generals are listed here.The list is arranged according to the generals' respective seniority.

Millard Harmon: Millard Fillmore Harmon Jr. (January 19, 1888 – February 26, 1945) was a lieutenant general in the United States Army Air Forces during the Pacific campaign in World War II.  He was presumed to have perished in February 1945 on a flight when the plane carrying him disappeared in transit.  Harmon, Frank Maxwell Andrews, Simon Bolivar Buckner Jr. and Lesley J. McNair, all lieutenant generals at the time of their deaths, were the highest-ranking Americans to die in World War II.

Maxwell and Tuke: Maxwell and Tuke was an architectural practice in Northwest England, founded in 1857 by James Maxwell in Bury.  In 1865 Maxwell was joined in the practice by Charles Tuke, who became a partner two years later.  The practice moved its main office to Manchester in 1884.  Frank, son of James Maxwell, joined the practice in the later 1880s and became a partner.  The two senior partners both died in 1893, and Frank Maxwell continued the practice, maintaining its name as Maxwell and Tuke.

Leonardopoulos–Gargalidis coup d'état attempt: The Leonardopoulos–Gargalidis coup attempt (Greek: Κίνημα Λεοναρδόπουλου-Γαργαλίδη ) was a failed military coup launched on 22 October 1923 in Greece by pro-royalist military officers under the Lieutenant Generals Georgios Leonardopoulos and Panagiotis Gargalidis, and the Colonel Georgios Ziras.  Its failure discredited the monarchy and contributed decisively to the establishment of the Second Hellenic Republic in March 1924.

List of serving generals of the Bangladesh Army: This is the list of the serving generals of the Bangladesh Army.  At present, the army has one full general, 5 lieutenant generals and 25 major generals.

List of lieutenant generals in the United States Army before 1960: List of lieutenant generals in the United States Army before 1960

Supporting paragraphs: Millard Harmon Frank Maxwell Andrews
Answer: United States Army Air Forces