 If the landings had gone to plan , the 11th Battalion was supposed to be crossing the plateau heading north . The 10th Battalion , south of the plateau , was to capture a Turkish trench and artillery battery behind Gun Ridge . The 9th Battalion , <unk> south , was to attack the artillery battery at Gaba Tepe , and the 12th Battalion was the reserve , with 26th Jacob 's Mountain Battery to establish their gun line on the plateau . Unknown to the ANZACs , the Turks had an artillery battery sited on 400 Plateau . 
