British tank Mark V Published 04.09.2016 at 1400 × 930 in British tank Mark V Mk V “Rhombus” (according to Soviet “Big”) in the color of the Red Army Comrade Trotsky Kubinka tank museum, Moscow region, Russia. Mk V “Rhombus” (according to Soviet “Big”) in the color of the Red Army Comrade Trotsky.