Let's say the 1919 German revolution succeeds, with the Entente too cash-strapped exhausted to stop both Germany and Russia from going communist. During the interwar period the Germans and Soviets intervene in Poland and Hungary, and by the late 30s another world war breaks out, with them overrunning the rest of Europe save Britain. Meanwhile, Germany and the Soviet Union work on an atomic bomb to force Britain and the US to the negotiating table. How quickly could a joint German/Soviet project lead to fruition? Since this Germany would be friendly to Jews, Jewish scientists won't flee the country like they did OTL, and they won't write off their work as 'Jewish physics'. They'd have the resources (if not the stolen US intelligence) of the Soviet project as well. Could they beat the WAllies to the bomb? By when?