Mcclelland, Harold Mark was born on November 4, 1893 in Tiffin, Iowa, United States. Son of John Mark and Mary Elizabeth (Corbet) Mcclelland.
Bachelor of Science, Kansas State N., 1916. Graduated from Army Flying School, 1918. Student Columbia, 1925-1926.
Graduate Air Corps Tactical School, 1936, Chemical Warfare School, 1936. Command and General staff schedul, 1937.
1 son, Alan John. Commissioned Second lieutenant Infantry, 1917. Promoted through grades to brigadier general, 1942, permanent major general, 1944. Appointed assistant chief of staff for operations and training G-3, of Special Army Observer Group, London, May 1941.
Air communications officer Army Air Forces, July 1942-April 1946. CG Airways and Air Communications Service (AACS), 1946. Now deputy commander services, Military Air Transport Service.
Decorations: Distinguished Service Medal Legion of Merit. Commander Order of British Empire.