The Battle of Jarrab was a territorial battle between the Al Sa'ud and their traditional enemies the Al Rashid in January 1915. It was a proxy battle of World War I between the British-supportedSa'udis and the Ottoman-supported Rashidis. The main significance of the battle was the death of Ibn Sa'ud's British Military Advisor, Captain William Shakespear. This diminished the relationship between Ibn Sa'ud and the British, changing the course of the Arab Revolt against the Ottoman Empire.