 The final objective was Maryang San , a steep hill rising 200 metres ( 660 ft ) above the valley about 2 @,@ 500 metres ( 2 @,@ 700 yd ) north of Hill 355 . However , following the delay in capturing Hill 355 , Hassett would not be ready to implement his plan until early the next day . As such the third phase would begin on 5 October , with the Royal Northumberland Fusiliers scheduled to attack an intermediate objective — Hill 217 , adjacent Kowang @-@ San — before assisting the Australians assault Hill 317 . The Australians moved into position northeast of Hill 199 on the afternoon of 4 October , while over the night of 4 / 5 October the divisional artillery hit Chinese positions , with two batteries of 8 @-@ inch ( 200 mm ) howitzers and another two 155 @-@ millimetre ( 6 @.@ 1 in ) batteries <unk> them . Air strikes by the Mustangs of No. 2 Squadron , South African Air Force were also planned , targeting Chinese concentrations north and west of the objectives to cut @-@ off supplies and reinforcements . Both the Australians and Fusiliers were scheduled to begin their attacks at first light — at 05 : 45 — following a heavy artillery preparation . 
