 The 2 / 28th Battalion probed into the Pocket on 16 June . The previous day a 2 / 11th Commando Squadron patrol had reported that the track along Lyon Ridge would be passable by tanks if a bomb crater was filled , and on the morning of the 16th A Company from the 2 / 28th Battalion accompanied by a troop of three tanks and a bulldozer began to move south along it . After the bulldozer filled the crater , the force continued along Lyon Ridge but became pinned down by heavy fire from Japanese troops on Eastman Spur to the south @-@ east of the ridge . One of the Australian tanks was damaged . A subsequent attempt by a section from the 2 / 11th Commando Squadron to advance towards Eastman Spur to the east of A Company was also beaten back , with two Australians killed and another wounded . A Company resumed its advance during the afternoon , supported by a new troop of tanks . The three tanks moved ahead of the infantry , and killed eight or ten Japanese personnel , but one was damaged by a bomb and another became bogged . By the end of the day , A Company had suffered five men killed and 23 wounded . Overall , 150 patients were admitted by the 24th Brigade 's attached medical units during 16 June , which stretched their capacity . 
