When war with Russia became apparent in the beginning of August, the Austro-Hungarian chief-of-staff Conrad von Hötzendorf decided to launch an offensive into Russian Poland with his northern armies (the 1st and 4th). As the Russian army would soon be able to mobilize forces greatly superior in numbers to that of the Central Powers in the East (especially the Austro-Hungarian armies, which were Russia's primary target), von Hötzendorf saw his only chance in an early victory. He also hoped that Germany would join his offensive into Poland, but that hope was frustrated by the fact that Germany only deployed few troops in East Prussia ordered entirely on the defence. Thus, the 1st and 4th Austro-Hungarian armies started their advance into Poland without definite German support. Initially they