Austria-Hungary’s last attempt to invade Serbia was a costly disaster. Now they are having another go. Potiorek’s army has been reinforced and now he sends his men across the river Drina. The Serbians put up a spirited resistance, inflicting heavy casualties on their enemies. The Austro-Hungarians make it across the river but they are unable to break out of their bridgehead. They suffer terribly from Serbian guns firing at them from concreted positions.