1920, when he was transferred to the Quartermaster Department at Headquarters Marine Corps. Long was transferred to the Marine Barracks Cavite, Philippines at the beginning of May 1920 and spent the next two years year. In November 1922, he returned to San Diego and, following his promotion to major in January 1924, he was transferred to the Marine Barracks Quantico. The 3rd Marine Brigade was formed there under Brigadier General Smedley Butler and sailed to China in May 1927, where he participated in the defense of the Shanghai International Settlement. Long received orders for return stateside in January 1929 and was attached again to the Quartermaster Department at Headquarters Marine Corps. He was ordered to the Field Officer's Course at Marine Corps Schools within Marine Barracks Quantico. After graduation, Long was promoted to lieutenant colonel in October 1934. In November 1934, he was ordered again to the Marine Barracks San Diego and remained there until the end of June 1936, when he was transferred to San Francisco at Headquarters of Department of Pacific. In this capacity, he was promoted to colonel in June 1938. World War II Long was appointed assistant chief of staff for supply of the Department of the Pacific (DoP) under Brigadier General Charles F. B. Price in 1940. In this capacity, he was promoted to the rank of brigadier general in August 1942. He was transferred to the South Pacific Area in May 1943, where was assigned to the staff of the I Marine Amphibious Corps (IMAC) under Major General Clayton Barney Vogel as commanding general of supply service. Long participated in Bougainville Campaign and later was transferred to the same capacity within V Amphibious Corps (VAC) under Major General Holland Smith. For his service with I MAC and VAC, Long was decorated with the Legion of Merit. When the Service Command Leet Marine Force Pacific (FMFPac) was formed on April 6 1944, Long was appointed its first commanding general. In this capacity, he was responsible for the supply, salvage, evacuation, construction, personnel management, quartering, and sanitation needs of all FMFPac units and others Marine units in its area. Long was promoted to the major general in November 1944. Shortly before the End of the War in Pacific, Long was relieved by Brigadier General Merritt A. Edson on June 30, 1945, and returned to the U.S. He was subsequently sent to San Diego area, where he