" challenger 2 ", 125 mm, a.zhirnov ., acs, armored howitzer, armored vehicles, art, based on, battle, bob, book, bundeswehr, challenger 2, english, enzo maio, forest, germany, hdozhnik, infantry, infantry fighting vehicle, is-2, leopard 1, lightweight, machine, main, mcv 80 warrior, military, mk.e, multipurpose, national people's army, nationale volksarmee, nna gdr, nva, pandur ii, panzerhaubitze 2000, picture, pzh 2000, russia, self-propelled artillery, self-propelled unit, shilka, sky ., soviet, sun uk, t- 80bv, t-26, t-72, tank, tanks, the army, the field, vehicles, vickers, war, was created, weapon, wheelbase, ww2, year, zenith, zsu- 23-4