reached the outskirts of Warsaw in the final days of July, 1944. The Soviet units belonged to the 1st Belorussian Front, participating in the Lublin-Brest Operation, between the Lvov-Sandomierz Operation on its left and Operation Bagration on its right. These two operations were colossal defeats for the German army and completely destroyed a large number of German formations. As a consequence, the Germans at this time were desperately trying to put together a new force to hold the line of the Vistula river, the last major river barrier between the Red Army and Germany proper, rushing in units in various stages of readiness from all over Europe. These units included a few high quality Panzer and SS Panzer divisions pulled from their refits, but also many infantry units of poor quality. In terms of combat power this scratch force was considerably inferior to what the Soviets had available. On the other hand, after their long advances in June and July the Soviet suffered from the usual difficulties with supply accompanying any long-range Soviet offensive that has advanced far beyond its starting line. The Soviet plan was to seize bridgeheads across the Vistula and the Narew rivers as jumping off points for the next offensive and then stop to resupply their units. This put Warsaw, straddling the river Vistula, right at the limit of planned Soviet advance. From the operational viewpoint seizing Warsaw was not a major priority for the Soviets, though clearly having possession of the city would be advantageous to them, especially if it could be captured with its infrastructure intact. However, it was not essential, as the Soviets already seized a series of convenient bridgeheads to the south of Warsaw, and were concentrating on defending them against vigorous German counterattacks. The Red Army was also gearing for a major thrust into the Balkans through Romania at around this time and a large proportion of Soviet resources was being sent in that direction. In the initial Battle of Radzymin Soviet advance armored units of the 2nd Tank Army suffered a setback which prevented them from taking Warsaw from the march. It was the presence of Soviet tanks in nearby Wołomin that sealed the decision of the Home Army leaders in Warsaw to launch the uprising. As a result of the battle, the Soviet tank army was pushed out of Wołomin to the east of Warsaw and pushed back about