On 4 August 1941, the air forces in the Philippines were brought under the control of MacArthur's headquarters, "except for routine administration and supply," and redesignated the USAFFE Air Force. It was only a token force. Of the 210 aircraft in the Islands, only the thirty-one P-40B's could be considered modern aircraft; the others, consisting of P-26's, P-35's, B-10's, B-18's, A-29's, C-39's and observation planes, were largely obsolescent. One field alone, Clark Field near Fort Stotsenburg, could accommodate heavy bombers.