The Germans are pushing the Russians out of East Prussia. Further south in Galica, their Austro-Hungarian allies are having less luck. Lemberg has fallen to the Russians. Conrad has been trying to stage his own counter-attack against the Russians, perhaps outflanking one of their advancing armies, but now he realises that his own forces are in danger of envelopment. He orders a withdrawal to the San river, which begins in some disorder. By now the Austro-Hungarians fighting the Russians have suffered some 350,000 casualties.
image source (Wikipedia)