The Dnieper–Carpathian offensive (Russian: Днепровско-Карпатская Операция, Dneprovsko-Karpatskaya Operatsiya), also known in Soviet historical sources as the liberation of right-bank Ukraine (Russian: Освобождение Правобережной Украины, 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. Consisting of a whole series of closely linked operations, the goal of this offensive was to split the Wehrmacht's Army Group South and to clear the German-Romanian-Hungarian forces from most of the Ukrainian and Moldavian territories, which were occupied by Axis forces. It was one of the biggest offensives of World War II, stretching over a 1,200 km (745 mi) front, to a 450 km depth (280 mi) and involving almost 3,500,000 troops from both sides. In the course of the operation, 20 Wehrmacht divisions were either destroyed, disbanded or required major rebuilding, while another 60 divisions were reduced to 50% of their establishment strength. Even worse were equipment losses, with thousands of precious tanks, assault guns, artillery and trucks being lost, principally through their abandonment in the spring mud. According to German General Kurt von Tippelskirch, this was the biggest Wehrmacht defeat since Stalingrad. As a result of this strategic offensive, Wehrmacht's Army Group South was split into two parts, north and south of the Carpathian Mountains. The northern portion was pushed back into western Galicia, while the southern portion was pushed back into Romania. The northern portion was renamed to Army Group North Ukraine, while the southern portion to Army Group South Ukraine, which was effective from 5 April 1944, although very little of Ukraine remained in German hands.