Eleventh Air Force
Established on 28 December 1941 as the Alaskan Air Force at Elmendorf Field, Alaska Territory. 11 AF was a United States Army Air Forces combat air force in the American Theater of World War II, providing air defense of Alaska and engaging in combat operations primarily in the Aleutian Islands and Northern Pacific during the Aleutian Islands Campaign.
Japanese Eleventh Area Army
The Japanese 11th Area Army was formed on February 6, 1945 under the Imperial General Headquarters and transferred to the control of the Japanese First General Army on April 8, 1945. It was part of the last desperate defense effort by the Empire of Japan to deter possible landings of Allied forces in central Honshū during Operation Downfall (or in Japanese terminology). The Japanese 11th Area Army was responsible for the Tōhoku region of Japan and was headquartered in Sendai, Miyagi.