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.

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.

(On April 16, he had sent a cablegram to the Director Air Service, stating that two of his Army fliers reported lost and delayed by engine trouble, were safe at Bluefields Bluffs.)

[4] As of May 29, 1919, Lt. Col. Harmon's 7th Aero Squadron at France Field, Panama Station, was given a reduction in force to 32 officers and 146 regular Army personnel.

This occurred sometime in the four-month period between August 5, when he was still reported to be a Lt. Col., and the first week of December 1920, when Maj. Harmon placed first among his fellow officers in pistol shooting competition at France Field.

[10] On March 10, 1928, Maj. Harmon commanded a formation of DH-4s and flew the California Lieutenant-Governor on a flight to Blythe for the official opening of the new bridge across the Colorado River.

[11] During the years of peace, he continued his training, graduating from the Command and General Staff School and the Army War College.

From 1927 to 1930, he was commandant of the Air Corps Primary Flying School at March Field, California, during which time he came into contact with the young men then entering aviation training.

On July 11, 1942, he was appointed major general, and a week later was placed in command of the Second Air Force, with headquarters at Fort George Wright, Washington.

However, this role brought him into conflict with Arnold's objective of maintaining absolute control of Twentieth Air Force operations independent of any theater commands.

On February 25, 1945, a C-87A Liberator Express carrying Harmon, and Brigadier General James R. Andersen, his chief of staff, departed Guam for Washington, D.C. via Kwajalein and Hawaii to resolve the fighter dispute.

As Japanese air power had been neutralized in the vicinity of the Marshall Islands for some time, it is highly unlikely that enemy fighters were the cause of loss.