The Soviet Union, and Stalin in particular, have often been accused by bourgeois historians of betraying the people of Warsaw when they rose up against the Nazi fascist occupiers in 1944, as the Red Army was approaching the outskirts of the city. The chief merit of this article is that it clearly and in detail debunks this slander. The author shows, with quotations from both Soviet military sources and a document from the British Foreign Office, that the real ones to blame were the Polish Government in Exile in London who called the uprising without any coordination with the Red Army. They did this, in conjunction with the British and U.S. governments, to ‘beat the Russians.’ This tragic adventure led to the defeat of the uprising and the subsequent decimation of the population and the destruction of much of Warsaw by the Nazis. It was only several months later that Warsaw, along with the rest of Poland, was liberated by the Red Army and the Polish democratic forces organised in the People’s Army, at the cost of thousands of lives.