The Sandomierz–Silesian Offensive was part of the Soviet Vistula-Oder Offensive (12 January - 3 February 1945). It was carried out by the 1st Ukrainian Front under Ivan Konev. The 1st Front begun its offensive on January 12, starting from the Sandomierz Bridgehead. Within 6 days the 1st Front has broken through the German front on the length of 250k and advanced from 120 to 150k; near the end of the offensive the Soviets have approached Breslau (Wrocław) and begun crossing of the Oder (Odra) river.