One of the tragedies of the Pacific War is the Bataan Campaign in 1941-42, where lack of food and medicine wore down the defenders more than the Japanese. There are a number of accounts from survivors that, during the retreat to Bataan, Army supply trucks went into Bataan-empty. The troops, their equipment, ammo, etc. had all been moved in, but the food was left behind in the QM depots, which the Japanese captured and used themselves. So WI the QMs are much more efficient (some say they were still in a peacetime mindset, demanding proper forms, approval from superiors, etc.), knowing that it's their necks too to get the stuff into Bataan? There were about 90,000 troops and some 30,000 refugees who made it into Bataan, along with the 15,000 man garrison on Correigidor and the island forts in Manila Bay, so if the food to last at least six months had been delivered during the retreat, how long would they have held out? No matter what, they're still cut off from real outside help, other than subs delivering critical supplies (AA fuses, medicine, etc.) and taking out key personnel (code-breakers, the Philippine Government, some, but not all, of the Army nurses-the rest were captured on Correigidor and were POWs for the duration, other intelligence personnel, etc.).