The Red Army, exhausted by a two-month offensive in Belarus and experiencing a deficit in ammunition and fuel, stopped its advance near Warsaw.
The failure of the Warsaw Uprising is mainly caused by its poor preparation and wrong political calculations of the Polish Government-in-exile. This Government did not have enough own forces, but it still did not want to cooperate with Moscow in preparation of the Uprising.
Despite the fact that the Red Army delivered weapons and ammunition to the Polish fighters by planes, it could not change the course of events.
A common Soviet and Russian disinformation narrative aimed to prove that Soviet troops could not support the Warsaw Uprising due to numerous objective reasons (such as the lack of necessary forces, overstretched supply lines, lack of communication with the Polish Home Army and the Polish Government in London, etc.). This message should be perceived as a part of the Kremlin’s policy of historical revisionism.
The Warsaw Uprising was the largest single military action realized by any European resistance movement during World War II – the number of Polish soldiers and civilians fighting in the Uprising was between 20 and 50 thousand.