 Fenby wrote that Hengyang would have probably fallen as the Japanese had committed overwhelming force, but the city could have had far longer than the seven weeks that it did if only Xue and his 10th Army had received more supplies, stating that Stilwell was remiss in attempting to command Sino-American forces fighting in Burma and in China at the same time.The Japanese ground forces advanced and seized Chennault's forward bases.Slowly, however, the greater numbers and greater skill of the Allied air forces began to assert themselves.