German Tank destroyer Sturmgeschütz III (StuG.III). Assault guns are replenishing ammunition during battles on the Mius River. The Mius-Front was a heavily fortified defensive line created by the Germans in October 1941 under direction of General Paul Ludwig Ewald von Kleist along the Mius River during World War II. Soviet troops twice tried to break through this line. The soviets finally succeeded in August 1943 when troops of the Southern Front broke through the German lines.