 At 16 : 30 the three battalions from the 72nd Infantry Regiment arrived and attacked from the north . At the same time the Australians and New Zealanders holding on at Baby 700 broke and ran back to an improvised line , from Walker 's Ridge in the north to Pope 's Hill in the south . The defence line at The Nek was now defended by nine New Zealanders , under the command of a sergeant ; they had three machine @-@ guns but the crews had all been killed or wounded . As the survivors arrived from Baby 700 their numbers rose to around sixty . Bridges in his divisional headquarters starting receiving messages from the front ; just after 17 : 00 Lieutenant @-@ Colonel George <unk> on Walker 's Ridge advised he was holding his position and " if reinforced could advance " . At 17 : 37 Maclagen reported they were being " heavily attacked " , at 18 : 15 the 3rd Battalion signalled , " 3rd Brigade being driven back " . At 19 : 15 from Maclagen again " 4th Brigade urgently required " . Bridges sent two hundred stragglers , from several different battalions , to reinforce <unk> and promised two extra battalions from the New Zealand and Australian Division which was now coming ashore . 
