Battle of the Dnieper
During the massive Battle of the Dnieper in autumn 1943, which secured the Left-bank or eastern Ukraine and cut off the German 17th Army in the Crimea, several Soviet bridgeheads were established across the right bank of the Dnieper River, which was declared to be "East Wall" by the Germans. These bridgeheads were expanded throughout November and December and became the platforms from which the Dnieper–Carpathian offensive was launched.