 Regardless, PVA harassing artillery and mortar fire intensified, causing a constant stream of casualties among the Australians.Intense PVA shelling struck Hill 121 and The Hook on the night of 19/20 July, with more than 300 rounds wounding four members of C Company, 2 RAR and further damaging the defences.That night the Marines were driven off the Berlin and East Berlin features on the left flank, further exposing The Hook, which became a salient.