 It was placed under command of General Berling; other notable commanders included General Karol Świerczewski and Col. Włodzimierz Sokorski.The division with its supporting elements was sent to the Eastern Front in September 1943 and its first major engagement was the Battle of Lenino.By March 1944, the corps had been strengthened with increasing armoured and mechanical support, and numbered over 30,000 soldiers.