The Battle of Cer was a military campaign fought between Austria-Hungary and Serbia in August 1914, starting three weeks into the Serbian Campaign of 1914, the initial military action of the First World War. It took place around Cer Mountain and several surrounding villages, as well as the town of Šabac. The Battle of Cer is known as the first Allied victory over the Central Powers in the First World War.

Oskar Potiorek was an officer of the Austro-Hungarian Army, who served as Governor of Bosnia and Herzegovina from 1911 to 1914. He was a passenger in the car carrying Archduke Franz Ferdinand of Austria and his wife Duchess Sophie of Hohenberg when they were assassinated in Sarajevo on 28 June 1914. Potiorek had failed to inform the driver of a change of route which led the royal car to take a wrong turn, stalling after trying to turn around, and ending up in front of Gavrilo Princip. In World War I, Potiorek commanded the Austro-Hungarian forces in the failed Serbian Campaign of 1914. He was removed from command, retiring from the army shortly afterward.