What is "mius-front"

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, first from December 1941 to July 1942 and from February to August 1942. By the summer of 1943, the Mius-Front consisted of three defense lines with a total depth of 40-50 kilometers. The Soviets finally succeeded in August 1943 during the Donbass Strategic Offensive when troops of the Southern Front broke through near the village of Kuybyshevo.