 In September the 97th Bomb Group left Grafton Underwood and consolidated its aircraft at Polebrook.In October the Group was transferred to the Twelfth Air Force in the Mediterranean theatre and then 15th Air Force and went on to lead a number of secret and daring missions all over Europe.The 305th Bombardment Group (Heavy), arrived from Muroc AAF, California during September 1942, replacing the 97th.