Chieftain tank
Another improvised armor upgrade may have also been added at the Taji complex. An additional 30 mm armor plate was welded on the front areas of the hull and turret, leaving an air gap matching the size of the armor, so that the power of a HEAT jet could be dissipated in the hollow space. This technique follows the principle of spaced armor. The Iraqi engineers tested this reinforcement against captured Iranian 120 mm Chieftain tank guns in 1989, apparently with some success.