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.