Though this broadside-attack tactic was effective, it came too late to have a real effect on the war, and only small numbers of Me 262s were equipped with the rocket packs. Most of those so equipped were Me 262A-1a models, members of "Jagdgeschwader" 7. This method of attacking bombers became the standard, and mass deployment of Ruhrstahl X-4 guided missiles was cancelled. Some nicknamed this tactic the Luftwaffe's Wolf Pack, as the fighters often made runs in groups of two or three, fired their rockets, then returned to base. On 1 September 1944, USAAF General Carl Spaatz expressed the fear that if greater numbers of German jets appeared, they could inflict losses heavy enough to force cancellation of the Allied bombing offensive by daylight.