341st Bombardment Group (341st BG)
U.S. Army Air Force (USAAF), 10th Air Force (10th AF)

Background
The 341st Bombardment Group (Medium) was part of the 10th Air Force (10th AF) in the U.S. Army Air Force (USAAF). The 341st Bomb Group included the Headquarters Squadron, 490th Bombardment Squadron (490th BS) "Burma Bridge Busters" and 491st Bombardment Squadron (491st BS). During World War II, operated the B-25 Mitchell in the South West Pacific Area (SWPA). On September 15, 1942 the 341st Bomb Group was activated at Karachi Airfield in Pakistan. On October 3, 1942 the 341st Bomb Group was assigned to the India Air Task Force (IATF).

Headquarters Squadron (HQ Squadron)
On September 15, 1942 Headquarters Squadron was activated at at Karachi Airfield in Pakistan.

490th Bombardment Squadron (490th BS) "Burma Bridge Busters"
On September 15, 1942 the 490th Bombardment Squadron (Medium) 490th BS was activated at at Karachi Airfield in Pakistan. Nicknamed "Burma Bridge Busters". One member of the squadron was Arnold Spielberg (father of Steven Spielberg).

On February 22, 1944 lost is B-25G Mitchell 42-64779 pilot Sutphen MIA February 22, 1944, 7 missing

On March 17, 1944 lost is B-25H Mitchell 43-4229 pilot Sanders MIA March 17, 1944, 5 missing.

References
Combat Squadrons of the Air Force World War II (1982) pages XXX [PDF pages XXX]

491st Bombardment Squadron (491st BS)
On September 15, 1942 the 491st Bombardment Squadron (Medium) 491st BS was activated at at Karachi Airfield in Pakistan.

On October 30, 1943 lost is B-25C Mitchell 41-12966 pilot Smith killing the entire crew on impact.

On May 13, 1944 lost is B-25H Mitchell 43-4360 pilot Gauvin, 6 missing.

References
Combat Squadrons of the Air Force World War II (1982) pages XXX [PDF pages XXX]

11th Bombardment Squadron (11th BS)
On October 24, 1942 the 11th Bombardment Squadron (11th BS) was based at Kunming Airfield in China sends a detachment to operate from Nanning Airfield in China.

References
Combat Squadrons of the Air Force World War II (1982) pages XXX [PDF pages XXX]

References
Burma Bridge Busters via Wayback Machine May 18, 2010
Associated Press (AP) "Computer pioneer Arnold Spielberg, Steven’s dad, dies at 103" August 26, 2020