the USAAF produced document 50–100, which was the training directive for Very Long Range operations. The group had already met many of the requirements by then, two glaring exceptions being instrument flying and rocket firing. The final weeks of training were concentrated on mastering those tasks. On 19 February 1945 the air echelon of the 506th FG aboard a train bound for California, where the aircraft carrier USS Kalinin Bay was waiting to carry them across the Pacific. The ship delivered the 506th to Guam on 17 March, and a week later the pilots flew their new P-51D-20s to Tinian. There they would stay for seven weeks, flying combat air patrols and practice missions while the field engineers on Iwo Jima prepared North Field for them at the northern end of the island. The group was assigned to Twentieth Air Force, which, in turn, attached the unit to VII Fighter Command 301st Fighter Wing. From Tinian the air echelon flew combat patrol missions under the control of Air Defense Command, Saipan, from 28 March to 28 April 1945. The air echelon joined the ground echelon at Iwo Jima in May 1945. From Iwo Jima, the 506th's squadrons attacked airfields, antiaircraft emplacements, shipping, barracks, radio and radar stations, railway cars, and other targets in the Bonin Islands and Japan. The group also provided air defense of Iwo Jima and escorted B-29s bombers in raids against Japan. In December 1945 the group moved to Camp Anza, California, and was inactivated 16 December 1945. Cold War The 506th was established as a Strategic Air Command Strategic Fighter Wing on 20 November 1952 and was assigned to SAC's Eighth Air Force. Activated on 20 January 1953, at Dow Air Force Base, Maine, the wing composed of the 457th, 458th and 462s Strategic Fighter Squadrons and was equipped with F-84G Thunderjets. SAC was founded by men who had flown bomb raids against Germany during World War II. They usually encountered swarms of enemy fighters and knew the importance of having fighter escorts, so they had fighter wings placed under their own operational control. Although assigned to SAC, the group was associated with Air Defense Command and assisted in providing air defense of Maine. The wing was deployed to Misawa Air Base, Japan between 13 August and 7 November 1953 to support SAC's rotational deployment of fighter units to northern Japan to perform air defense duties,