In the spring of 1944, the division moved to the area of Kowel in occupied Poland, where it was to support Army Group South during the expected Soviet spring offensive. However, Operation Bagration, (started on 22 June 1944), was aimed at Army Group Centre and the division retreated with the rest of the German army. Assigned to the XXXIX Panzer Corps under Gen. Karl Decker, the division withdrew to the area of Warsaw, where the Soviet advance ran out of momentum at the end of July. The 4th Panzer Division took part in the Battle of Radzymin (also known as the Battle of Wołomin) and on 2 August 1944, alongside the 19th Panzer Division, threw the Soviet III Tank Corps back to Wolomin. The Soviet Tank Corps suffered heavy losses and their advance halted.
