Battle of the Drina
The Battle of the Drina (Serbian: Bitka na Drini, Битка на Дрини) was fought between Serbian and Austro-Hungarian armies in September 1914, near Loznica, Serbia, during the First Serbian campaign of World War I. After a first failed invasion of Serbia where he lost 40,000 men, Oskar Potiorek, the Austro-Hungarian commander of the Balkanstreitkräfte, launched a new offensive across the River Drina at the western Serbian border; after successfully crossing the river the night of 7—8 September the Austro-Hungarian forces were stopped facing strong Serbian defensive positions. In the meantime, the Serbian army was forced to end their offensive into Austrian Syrmia and regroup their forces to face the threat.