I had posted this in your "What If?" thread,
"In a letter prepared on 5 December 1941 but never sent, General Marshall outlined for General MacArthur what had been and was being done to strengthen USAFFE. "Reinforcements and equipment already approved," he said, "require over 1,000,000 ship tons." Fifty-five ships had already been obtained and approximately 100,000 ship tons of supplies were en route, with twice this amount ready for immediate shipment to ports of embarkation. Requests for equipment for the Philippine Army, except those for the M1 rifle, had been approved, and uncontrolled items of supply were being shipped as rapidly as they could be assembled and loaded on ships. "Not only will you receive soon all your supporting light artillery (130 75-mm. guns]," Marshall told MacArthur, "but 48 155-mm. howitzers and 24 155-mm. guns for corps and army artillery." Except for certain types of ammunition, the defense reserve for the U.S. Army by July of that year. Three semimobile antiaircraft artillery regiments were scheduled to leave the United States soon, but the 90--mm. antiaircraft gun could not be sent since it had not yet been fully tested. A sum of $269,000,000 had been requested from Congress for the support of the Philippine Army, and early passage of such legislation was expected. "I assure you," Marshall closed, "of my purpose to meet to the fullest extent possible your recommendations for personnel and equipment necessary to defend the Philippines."[65]
The last vessels carrying supplies to the Philippines were assembled in convoy in Hawaii and on 7 December were still on the high seas. In the convoy were the 52 dive bombers of the 27th Bombardment Group, 18 P-40s, 340 motor vehicles, 48 75-mm. guns, 3,500,00 rounds of .30- and .50-caliber ammunition, 600 tons of bombs, 9,000 drums of aviation fuel, and other heavy equipment and supplies. Also aboard were the two light field artillery battalions and the ground echelon of the 7th Bombardment Group (H)."
HyperWar: US Army in WWII: Fall of the Philippines [Chapter 3]