German troops have served a sound thrashing to Russian forces who tried to invade East Prussia. The Austro-Hungarian army has been less fortunate, suffering a series of defeats in battles in Galicia. German leaders are concerned that its ally is on the brink of collapse. To prevent such a disaster, they despatch a large force to aid Austria-Hungary. This 9th German Army will form the nucleus of a combined counter offensive into Russian Poland. Now they are in place and ready to strike.
image source (Wikipedia)