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April 9th, 1943 (FRIDAY)
TUNISIA: Ninth Air Force P-40’s in a fighter-bomber role attack Sfax, as the British Eighth Army, in pursuit of the retreating enemy, reaches a position a few miles to the southwest of the coast. Northwest African Air Force fighters continue reconnaissance of the northern half of Tunisia and the Straits of Sicily and hit enemy movement and defences over wide areas between Sfax and Enfidaville. (Jack McKillop)
NORTH AFRICA: The British 8th Army takes Maharos, 50 miles south-west of Gabes.
NEW GUINEA: Fifth Air Force B-25 Mitchells bomb and strafe the airfield and town and dock areas of Madang. A-20 Havocs hit the Kitchen Creek-Mubo area and individual B-17s attack barges at Bogia, Alexishafen and Finschhafen and hit the town of Wewak. (Jack McKillop)
ADMIRALTY ISLANDS: Individual B-17 Flying Fortresses strafe vehicles at Lorengau on Manus Island. (Jack McKillop)
PACIFIC OCEAN: US submarines sink four Japanese ships.
- USS Drum (SS-228) attacks a Japanese convoy, sinking an army cargo ship about 180 miles (290 km) north-northwest of Kavieng, New Ireland Island, Bismarck Archipelago.
- USS Grayling (SS-209) in an attack on a Japanese convoy off Mindoro, Philippine Islands, sinks an army cargo ship about 10 miles (16 km) east of Dumali Point
- USS Tautog (SS-199) attacks a Japanese convoy in Buton Passage, off south-eastern Celebes Island, Netherlands East Indies, sinking an army cargo ship. Tautog then sinks destroyer HIJMS Isonami as the enemy warship attempts to rescue survivors. (Jack McKillop)
TERRITORY OF ALASKA: ALEUTIAN ISLANDS: An Eleventh Air Force B-24 Liberator flies reconnaissance over Kiska, Attu and the Semichis while P-40’s fly reconnaissance over Kiska. (Jack McKillop)
U.S.A.: The USN re-establishes the rank of Commodore. (Jack McKillop)
USS Grayling was credited with a kill today. That is the submarine honored by the Colorado memorial.