Japanese air defence of naval base at Yokosuka, Japan strengthened according to the U.S. Joint Intelligence Committee. Daily summary dated 6 March 1942

An item reported that the Japanese strengthened the air defence of the import naval base at Yokosuka by stationing another two air groups.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 86 dated 6 March 1942.