sentences:  The soldiers cleared fields of fire and set out clear engagement areas to the north, northwest and south of the knoll, to allow maximum effectiveness of their supporting Vickers medium machine guns and Bren light machine guns.Barbed wire was laid out, and booby traps set.The main attack was planned for 1 April, but as the various Japanese units moved into position, a number of minor probes were made by elements of the Japanese 6th Engineer Regiment in the Australian rear areas and along their line of communications.