 Despite the Ordnance Department's development of new 76 mm and 90 mm anti-tank guns, the Army Ground Forces rejected their deployment as unnecessary.An attempt to upgrade the M4 Sherman by installing the 90 mm-armed turret from the T26 tank project on an M4 hull in April 1944 was halted after realizing it could not go into production sooner than the T26 and would likely delay T26 development.Even in 1943, most German armored fighting vehicles (later models of the Panzer IV, StuG III, and Marder III) mounted the 7.5 cm KwK 40.