On what date did the Soviets attack the 3rd Panzer Army with 700 tanks ?
However , the attack by the XXXIX Panzer Corps was unable to reach the Plöne Lake due to resistance by the Soviet 2nd Guards Tank Army , stalling some 70 kilometers from Küstrin after pushing the Russians out of Sallenthin and Muscherin , reoccupying some land on the eastern shore of Lake Madü , and recapturing Pyritz .