Japan strengthening naval and air force at Penang, Malaya according to the U.S. Joint Intelligence Committee. Daily summary dated 9 March 1942

An item reported that the Japanese added light surface forces to the submarines and air forces operating from Penang, Malaya threatening the Allied communication lines with British India.(1)

Note

1. The Japanese 8th Submarine Squadron was based at Swettenham Pier, George Town, Malaysia between 1942-1944. Furthermore was also the German Gruppe Monsun or Monsoon Group submarines stationed at Penang between 1943-1944 and were Italian submarines like the Marconi-class Luigi Torelli active in the Far East.

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 89 dated 9 March 1942.