THU 9 SEP 1943
Four high-speed transports bombard Lae, New Guinea.
Submarine Grayling (SS-209) is sunk, possibly rammed by Japanese transport Hokuan Maru in the South China Sea west of Luzon.
The Silent Service - "The U.S.S. Grayling Story"
Submarine Harder (SS-257) sinks Japanese merchant cargo ship Koyo Maru, 35°30'N, 140°40'E.
Submarine Permit (SS-178) damages Japanese cargo vessel Tateyama Maru 09°00'N, 168°40'E.
Submarine Pompano (SS-181) damages Japanese army cargo ship Nanking Maru, 40°12'N, 141°55'E.
Tank landing craft LCT-366 founders and sinks in heavy weather, 53°01'N, 152°00'W.
German submarine U-214 lays mines off Colon, Canal Zone, off the Atlantic entrance to the Panama Canal.
Italian mainland is invaded in Operation AVALANCHE. Under protection of the Western Naval Task Force TF 80 (Vice Admiral H. Kent Hewitt, USN), the Allied Fifth Army (Lieutenant General Mark W. Clark, USA) lands on the assault beaches in the Gulf of Salerno. Off the invasion beaches, tug Nauset (AT-89) is sunk by dive bomber, 40°38'N, 14°38'E; tank landing ships LST-336, LST-375, and LST-385 are damaged by shore batteries, and LST-386 is mined, 40°40'N, 14°44'E; LST-389 is damaged by shore batteries, 40°22'N, 14°59'E.