The Battle of Tell 'Asur, also known as the actions of Tel Asur or the Battle of Turmus 'Aya, took place 8–12 March 1918, after the decisive victory at the Battle of Jerusalem and the Capture of Jericho during the Sinai and Palestine Campaign of World War I. Fighting took place over an area which extended from the Mediterranean to Abu Tellul and Mussalabeh on the edge of the Jordan Valley.

The XXI Corps was an Army Corps of the British Army during World War I. The Corps was formed in Palestine in August 1917 under the command of Lieutenant General Edward Bulfin. It formed part of the Egyptian Expeditionary Force (EEF) and served in the Sinai and Palestine Campaign. At the Battle of Sharon it fought what has been described as 'one of the most overwhelmingly successful operations of the war' and 'a precursor to the modern Blitzkrieg.' It then carried out remarkable march up the coast of modern-day Lebanon as the war came to an end.