On 11 May, the 2/3rd sent patrols to Bobdubi Ridge and subsequently occupied it, having found that the Japanese had abandoned it; long range exchanges of fire with Japanese troops on Komiatum Ridge followed, and a full scale Japanese attack followed, supported with artillery, pushing the commandos from the ridge on 14 May. This was followed by heavy air attacks on Australian positions on 15 May. Elsewhere, in an effort to defend the approaches to Wau, troops from the 2/7th Infantry established themselves in a defensive position around Lababia Ridge, which was located about 2 kilometers south-west of Mubo, and throughout late June, the Australians fought a defensive action along the ridge.