Dnieper–Carpathian offensive

The Dnieper–Carpathian offensive (Russian: Днепровско-Карпатская операция, romanized: Dneprovsko-Karpatskaya operatsiya), also known in Soviet historical sources as the Liberation of Right-bank Ukraine (Russian: Освобождение Правобережной Украины, romanized: Osvobozhdeniye Pravoberezhnoy Ukrainy), was a strategic offensive executed by the Soviet 1st, 2nd, 3rd, and 4th Ukrainian Fronts, along with the 2nd Belorussian Front, against the German Army Group South, Army Group A and elements of Army Group Center, and fought from late December 1943 to early May 1944. The battles in right-bank Ukraine and in the Crimea were the most important event of the 1944 winter-spring campaign on the Eastern Front.

Source: Wikipedia — Dnieper–Carpathian offensive (CC BY-SA 4.0)