From late April 1916 , after a German-led Ottoman force Military_operation attacked Attack British yeomanry at Katia , British Empire forces in the region at first doubled from one brigade to two and then grew as rapidly as the developing infrastructure could support Supporting them .

The retiring Departing force Military_operation was pursued Aiming by the Anzac Mounted Division between 6 and 9 August , during which the Ottomans and Germans forces fought Hostile_encounter a number of strong rearguard actions against the advancing Cause_to_make_progress Australian light horse , British yeomanry and New Zealand mounted rifle brigades .