"United States Marine Corps Air-Ground Integration in the Pacific Theater" addresses how the United States Marine Corps dealt with the challenge of air support for the infantry in the Second World War. Sources for research included primary documents on doctrine and personal interviews from the United States Air Force Historical Research Agency. Periodicals written before and immediately after the war provided additional information. The research indicated that the Marines developed an effective means for air-ground integration during the Second World War. A great deal of this success was due to the Marine Corps' philosophy of airpower as well as to experience gained during the interwar years, particularly in Nicaragua. In addition, the unique environment in the Pacific influenced many of the procedures that were developed. Finally, the Marines learned a great deal during the course of the Pacific campaign itself. The battles of Guadalcanal, Bougainville, and Luzon illustrate the significant innovations and improvements that were made during the war.