Drina

Border river between Bosnia-Herzegovina and Serbia. The battle of the Drina (August 12–21, 1914) was, for Austria-Hungary, the most unfortunate conceivable prelude to the war against Serbia. The prime cause was the incomplete deployment of the Austro-Hungarian forces. The forces ranged against Serbia comprised not only the Fourth and Fifth Armies, but also the Second Army, which had been earmarked for use against the Russians in the event of the opening of a second front in Galicia. However…