M12 GMC (1942) Tank Encyclopedia
The 155mm Gun Motor Carriage M12 neverthless, once reconditioned, served with distinction as an infantrysupport weapon, and throughout 1944, until early 1945 it saw use in direct fire as a bunkerbuster during the assault on the Siegfried Line. "ChooChooBamâ" covering Patton''s 3rd army during their assault on Echternath, luxemburg Feb 45.