After this , the Australians were able to resume their advance to the river on 7 May without further opposition . The previous three weeks in which they had advanced 7 @,@ 000 yd ( 6 @,@ 400 m ) to the Hongorai had been costly for them , however , with the Australian 24th Infantry Battalion losing 25 killed and 95 wounded . Against this , the Japanese had lost at least 169 killed .