Львовско-Сандомирская операция
On 12 July 1944 the Soviet 1st Ukrainian Front launched a massive offensive in the direction of Lvov (the Lvov–Sandomierz Offensive). The front had over 800,000 men, 13,000 guns and mortars and 200 tanks, attacking with 2 main groupings, both rapidly broke through the German defenses and by the 6th day of the operation had trapped several units in a pocket under XIII Army Corps command, including elements of 8th Panzer Division.