- Activated 1 May 1943 at Gowen Field Idaho where initial training was conducted.
- The unit moved to Wendover Field, Utah on the July 4 1943 for the second phase of training.
- Final training at Sioux City AAB, Iowa from 16 September to early November 1943.
- The ground unit went to Camp Shanks, NY, and sailed on the Queen Elizabeth to the United Kingdom on the 23rd of November 1943, arrived at Clyde,Scotland on the 29th November 1943.
- The aircraft left Sioux City on the third of November 1943 for Herrington field in Kansas. The route flown to the UK was via the Southern ferry route. This route was Puerto Rico, Trinidad, Belem, Dakar, and Marrakesh the finally to the UK.
- During the ferry flight, three aircraft were lost.
Below is a brief timeline of the subsequent 448th Bomb Group deployments during WW2
- Salzberg was the last mission on 25th April 1945
- July 1945 the Bomb Group returned to the USA.
- Assigned to the Second Air Force equipped with the Boeing B-29 Superfortress specialising in conversion and training.
- A planned deployment to Okinawa was cancelled following the end of the war with Japan.
- The unit was deployed to McCook Army Airfield, Nebraska when training was complete. Following the course completion, the base was closed. shortly arter the group was moved to Fort Worth AAF.
The postwar era brought change.
- The 448th Bombardment Group was one of the original ten USAAF bombardment groups assigned to Strategic Air Command on 21 March 1946.
- The unit was inactivated on 4 August 1946 at Fort Worth, its B-29 aircraft and personnel being reassigned to the senior 92d Bombardment Group which was reactivated due to the Air Force’s policy of retaining only low-numbered groups on active duty after the war.
- Allocated to the Air Force Reserve as a Tactical Air Command B-26 Invader light bomb group in 1947;
- Activated in 1951 with its personnel and aircraft being reassigned to active duty units in Far East Air Forces for combat in Korea.
- Deactivated immediately after the Korean war.
- Briefly activated as a fighter-bomber group in the late 1950s. Deactivated in 1957.