On 5 March 1944 the Red Army launched the Uman–Botoșani Offensive against the German Army Group South in Ukraine. The aim was to inflict a crushing defeat on the German “Uman group” and split the German forces, allowing the Soviet army to capture southwestern Ukraine. Up against them was the 8th Army of Army Group South, led by Generalfeldmarschall Erich von Manstein.
The photograph below shows Soviet T-34/85s paused during an advance in 1944.
If you are interested in reading more about the Eastern Front then be sure to check out Atlas of the Eastern Front, Men-at-Arms 468: World War II Soviet Armed Forces (2), Warrior 93: German Infantryman (3) Eastern Front 1943-45 and Warrior 123: Soviet Rifleman 1941-45.