in position while he attacked with Brigadier George Wootten's 18th Australian Infantry Brigade, supported by Australian armor and artillery consisting of M3 Stuart light tanks of the 2/6th Armoured Regiment and 25 pounders of the 2/1st Field Regiment. Doe, "eager to come to close grips with the Japanese", requested permission to launch an attack against the enemy Perimeters Q and R between his two roadblocks. Herring and Vasey thought that he was underestimating the enemy, but Vasey gave permission for the attack, provided that it would not jeopardize the main plan. The attack went ahead on the afternoon of 8 January 1943 but both attacking companies of the 1st Battalion, 163rd Infantry encountered heavy fire and were thrown back. First Lieutenant Harold R. Fisk became the first officer of the division to be killed in action. His body could not be immediately recovered. He was posthumously awarded the Silver Star. The roadblock position he had attacked from was named Fisk in his honor. The first part of Vasey's plan involved the blocking of the Killerton Trail to prevent the Japanese from using it as an escape route, and to provide a jumping off point for a later advance by the 18th Infantry Brigade. The 2nd Battalion, 163rd Infantry, under Major Walter R. Rankin, set out early on 9 January 1943. Company G, covering the flank of the advance, was strongly engaged by Japanese heavy machine gun, mortar, and rifle fire. The remainder of the battalion established themselves astride the trail in a new position which was named Rankin after the battalion commander. The attack had cost four dead and six wounded. More casualties would be taken holding the position over the next few days. On 10 January, a patrol from the 163rd Infantry discovered that the Japanese had unaccountably evacuated Perimeter Q. This was occupied at once by Company A, which sent out tree snipers and patrols to harass the enemy and feel out the contour of the Perimeter R, which was now open to attack from all sides. The Japanese had left behind a considerable quantity of material, including a water-cooled .50 caliber machine gun. The Japanese had evidently been very hungry and there was evidence of cannibalism. With the roadblock established, the 18th Infantry Brigade launched the main attack against Perimeter P on 12 January. Vasey's plan of attack was based on the assumption that the Japanese defenders