Sunday, April 12, 2026

Monday, 13 April 1942

US NAVY

PACIFIC—Submarine Grayling (SS-209) torpedoes and sinks Japanese merchant cargo ship Ryujin Maru off southwest tip of Shikoku, Japan, 31°51'N, 132°50'E. Destroyer Minazuki drives off Grayling with depth charges.

            Japanese transport No.3 Hino Maru is damaged by aircraft (nationality unspecified) off Koepang, Timor.

ATLANTIC—Unarmed U.S. tanker Esso Boston, torpedoed and shelled by German submarine U-130 the previous day, sinks; the entire 37 man crew is rescued by destroyer Biddle (DD-151) and taken to San Juan, Puerto Rico.

            Abandoned U.S. tanker Eugene V.R. Thayer, shelled on 9 April by Italian submarine Pietro Calvi, sinks off coast of Brazil.

US ARMY AIR FORCE

FIFTH AF—Australia-based B‑25’s hit targets in the  Philippine Islands for second consecutive day. Staging through Valencia the B‑25’s take off just after midnight during 12/13 Apr and bomb Cebu shipping and installations at Davao. Later in the day the Medium Bombers again attack Davao, bombing the dock area.

SOUTH PACIFIC—Adm Ghormley is assigned as COMSOPAC. He is to command all Allied base and local def forces (land, sea, and air) in the South Pacific islands, with the exception of NZ land defenses.

US ARMY

SOUTH PACIFIC—Vice Admiral Robert L. Ghormley is designated Commander, South Pacific Area (COMSOPAC) and S Pac Forces.

BURMA—Gap develops in Burma I Corps line, and Japanese are moving N through it toward oil fields. Burma 1st Division, under pressure S of Magwe, is reinforced by 7th Armored Brigade (less 7th Hussars). General Stilwell’s orders designed to avert threat to Lashio—93d Division (less regiment) is directed to move to Taunggyi; 49th Division plus regiment of 93d is to continue to guard Thailand border; T-55th Division is to remain in Mawchi-Loikaw area—are delivered to Chinese 6th Army. Chinese 66th Army, less 38th Division, is to concentrate below Mandalay.

US MARINE CORPS

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