Early glide bomb used by the USAAF to some extent during World War II on select targets. Due to the size and mass of the bomb, B-17s could only carry two GB-1s at once. It had mixed success, as during an airstrike on Cologne on May 28, 1944, 71 of the 113 bombs' batteries failed to hold a charge, causing the autopilot to not engage, missing the Eifeltor marshalling yard in the process. Only 42 hit Cologne, killing 90. None were shot down as German AA crews thought they were downed aircraft
Alongside the Fritz X, Azon, ASM-N-2, V-1, and V-2, it is one of the few guided weapons to see service during World War II.



