Large Japanese naval force involved in attacking the Philippines according to the U.S. Joint Intelligence Committee. Daily summary dated 19 December 1941

An item referred to CINC Singapore reporting that the Japanese had 17 warships and 24 transports used in their attack on the Philippines.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 9 dated 19 December 1941.