the resources to implement Krueger's strategy, and he conducted a fighting withdrawal instead. Krueger travelled to Aitape where Hall presented him a counterattack plan, which he approved. By August, the fighting had ended and Adachi had been defeated. Philippines Campaign MacArthur accelerated his timetable yet again in September 1944, and brought forward the planned invasion of Leyte to October 1944. That this was the worst time of the year for campaigning on Leyte was not overlooked. Typhoons and heavy rains hampered the efforts to construct and rehabilitate airbases, and without them, large numbers of aircraft could not operate from Leyte. This meant not only that few air strikes could be flown in support of the Sixth Army, but that the Allied Air Forces could not prevent the Japanese from reinforcing Leyte. An additional five Japanese divisions and two mixed brigades were sent to Leyte, and the battle became one of grinding attrition. Able to view his troops in action more often than hitherto, Krueger found much to criticize. He noted that tanks were employed poorly, that the infantry were not aggressive enough, and saw poor sanitation and meals as a sign that officers were not taking adequate care of their men. Krueger's generalship has also been questioned, with Ronald Spector criticizing "Krueger's disastrous decision to delay the push into the mountains west of Carigara in favor of beach defense." Krueger based his cautious appreciation of the situation on various intelligence sources rather than relying solely on Ultra. In January 1945, the Sixth Army embarked on its largest, longest and last campaign, the invasion of Luzon. Krueger intended to make "maximum utilization of America's materiel and industrial superiority". Once again, intelligence estimates of Japanese strength were questionable. MacArthur's intelligence officer, Brigadier General Charles A. Willoughby, basing his estimates on Ultra, believed that there were about 172,000 Japanese troops on Luzon. Krueger's intelligence officer, Colonel Horton V. White, reckoned that there were 234,000. MacArthur did not believe there were anywhere near that number. In fact, General Tomoyuki Yamashita had 287,000 troops on Luzon. For the first time since Louisiana in 1941, Krueger was able to maneuver his army as a single body instead of having elements employed on multiple battles on scattered islands. He regarded Yamashita's employment of armor as poor. Instead of using the 2nd Armored Division for a decisive counterattack against the vulnerable flank, Yamashita frittered away its strength in