Group - Bomb

To coordinate massive "Maximum Effort" formations, each group used distinct visual markings:

: 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). 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. To coordinate massive "Maximum Effort" formations