The First World War: Downfall of the Habsburgs (Part 6)

After endeavouring to wreak their revenge on Serbia, what would be the greatest hammer blow to the Austro-Hungarian Empire during the First World War? With Leviv having fallen apocalyptically to the Russian hordes, what had gone so wrong? How might the war have been brought to an end before Christmas of 1914? And, with the darkness gathering around the Austrian defences, could the great fortress of Przemyśl hold out against the Russian barrage for a second time…?