Bomb Group -

: Bomb groups operated under a Wing (tactical control), which reported to an Air Division (strategic planning), which in turn reported to a numbered Air Force (e.g., the Mighty Eighth Air Force in Europe).

: Beyond aircrews (pilots, navigators, bombardiers, gunners), a group required extensive ground support, including armorers, mechanics, and administrative staff. Operational Identification bomb group

: Letters or symbols painted on aircraft tails identified the group and its division. For instance, a "Square J" identified the 390th Bomb Group. : Bomb groups operated under a Wing (tactical