In November 1942, a survey team evaluated an area near the Green Mill Dance Club and Rainbow Dam Road approximately east of Great Falls. Great Falls, along with ten other northern tier sparsely populated sites, was considered for a heavy bomber training base. Construction began on Great Falls Army Air Base (AAB) on 8 June 1942. The base was informally known as East Base since the 7th Ferrying Group was stationed at Great Falls Municipal Airport on Gore Hill (known as Gore Field during its military use). Its mission was to establish an air route between Great Falls and Ladd Field, Fairbanks, Alaska, as part of the United States Lend-Lease Program that supplied the Soviet Union with aircraft and supplies needed to fight the German Army.thumb|The first B-17 landing at Great Falls AAB, 30 November 1942|alt=|leftGreat Falls AAB was assigned to II Bomber Command, Second Air Force. Its initial base operating unit was the 352d Base HQ and Air Base Squadron. Airfield operations began on 30 November 1942 when the first B-17 Flying Fortress landed at the new base. Four Bombardment Groups, the 2nd, 385th, 390th, and 401st, trained at Great Falls AAB from November 1942 to October 1943 under Army Air Force Training Command. Group Headquarters and one of the Groups' four squadrons were stationed in Great Falls with the other squadrons stationed on sub-bases at Cut Bank, Glasgow, and Lewistown, Montana. Aircraft would take off at a predetermined time, form up in squadron formation over their respective location, and later, over central Montana, join up in group formation. These bombardment groups went on to participate in decisive raids over Germany as part of Eighth Air Force opening the door for Allied daylight precision bombing.Maurer, Maurer (1983). Air Force Combat Units Of World War II. Maxwell AFB, Alabama: Office of Air Force History. .
In November 1942, a survey team evaluated an area near the Green Mill Dance Club and Rainbow Dam Road approximately east of Great Falls. Great Falls, along with ten other northern tier sparsely populated sites, was considered for a heavy bomber training base. Construction began on Great Falls Army Air Base (AAB) on 8 June 1942. The base was informally known as Eas.t Base since the 7th Ferrying Group was stationed at Great Falls Municipal Airport on Gore Hill (known as Gore Field during its military use). Its mission was to establish an air route between Great Falls and Ladd Field, Fairbanks, Alaska, as part of the United States Lend-Lease Program that supplied the Soviet Union with aircraft and supplies needed to fight the German Army.thumb|The first B-17 landing at Great Falls AAB, 30 November 1942|alt=|leftGreat Falls AAB was assigned to II Bomber Command, Second Air Force. Its initial base operating unit was the 352d Base HQ and Air Base Squadron. Airfield operations began on 30 November 1942 when the first B-17 Flying Fortress landed at the new base. Four Bombardment Groups, the 2nd, 385th, 390th, and 401st, trained at Great Falls AAB from November 1942 to October 1943 under Army Air Force Training Command. Group Headquarters and one of the Groups' four squadrons were stationed in Great Falls with the other squadrons stationed on sub-bases at Cut Bank, Glasgow, and Lewistown, Montana. Aircraft would take off at a predetermined time, form up in squadron formation over their respective location, and later, over central Montana, join up in group formation. These bombardment groups went on to participate in decisive raids over Germany as part of Eighth Air Force opening the door for Allied daylight precision bombingMaurer, Maurer (1983). Air Force Combat Units Of World War II. Maxwell AFB, Alabama: Office of Air Force History. .