Saturn, the follow-on to the encirclement of the German 6th Army at Stalingrad where it destroyed the Hungarian Second Army. Following Operation Saturn, the front was involved in Operation Star, which included the Third Battle of Kharkov, which resulted in a long battle from 2 February to 23 March 1943, and the reversal of much of the Soviet gains by the Germans. During Zvezda the front included the 38th, 40th, 60th, and 69th Armies plus the 3rd Tank Army, resulting in the reorganisation of the 3rd Tank Army as the 57th Army due to its destruction. In the Battle of Kursk in August 1943, the front operated on the southern shoulder, during which it commanded the Battle of Prokhorovka on the Soviet side. During Operation Polkovodets Rumyantsev, which began on August 3, 1943, the front included 38th, 40th, 27th Armies; the 6th and 5th Guards; and the 1st and 5th Guards Tank Armies. During this battle both the 1st and 5th Guards Tank Armies made their main effort in the 5th Guards Army sector, and succeeded eventually in liberating both Belgorod and Kharkov. One of the divisions in the 5th Guards Army was the 13th Guards Rifle Division. The front also fought in the subsequent liberation of eastern Ukraine. On October 20, 1943, the Voronezh Front was renamed to the 1st Ukrainian Front. This name change reflected the westward advance of the Red Army in its campaign against the German Wehrmacht, leaving Russian Soviet Federative Socialist Republic behind and moving into Ukrainian Soviet Socialist Republic. During 1944, the front participated with other fronts in the battles of Korsun-Shevchenkivskyy, and the battle of Hube's Pocket in Ukraine. It conducted the Lviv-Sandomierz Offensive, during which the Front was controlling the Soviet 1st Guards Tank Army, 3rd Guards Tank Army, 4th Tank Army, 3rd Guards, 5th Guards Army, 13th, 38th, and 60th Armies and 1st Guards Cavalry Corps. It then took part in the battle for Ternopil'. The front participated or conducted battles in Ukraine, Poland, Germany, and Czechoslovakia during 1944 and 1945. The 1st Ukrainian often spearheaded the whole Eastern front. The 1st Ukrainian and the 1st Belorussian fronts were the largest and most powerful of all Soviet fronts as they had the objective of reaching Berlin and ending the war. In 1945 the front participated in the Vistula-Oder offensive, and conducted the Silesian and Prague Operations, and the siege of Breslau.