Air Operations, CBI

• 16 23rd Fighter Group P-40 fighter-bombers attack rail facilities at Yoyang in two waves.

Air Operations, Europe

Over 100 US Fortress bombers make a devastating daylight raid on Leghorn (Livorno). P-40s and Marauders hiit 4 Sicilian airfields despite 'terrific flak'.

• 12 Venturas bomb a power stations at Zeebrugge.
• 1 Ventura is lost.

• 34 aircraft lay mines in the Frisians, off the Brittany ports and in the Gironde River and there are 5 OTU sorties.
• There are no losses.

• NASAF B-17s attack the harbor, oil facilities, and a marshalling yard at Leghorn.
• IX Bomber Command B-24s attack Augusta.
• Two separate IX Bomber Command B-24 formations attack the important Axis airbase complex at Foggia for the first time.

Air Operations, Gilberts

3 VII Bomber Command B-24s based at Canton Island attack Abemama Atoll.

Air Operations, Mediterranean

14th Fighter Group P-38s down 2 Bf-109s about 1800 hours near Favignana Island in the Egadi group.

Air Operations, New Guinea

43rd Heavy Bomb Group B-17s and 90th Heavy Bomb Group B-24s attack the airfields at Boram, Dagua, and Wewak and the Wewak-Dagua road.

Air Operations, Sardinia

NAAF P-40 and NATAF A-20s attack various targets.

Air Operations, Sicily

NASAF medium bombers attac, the Bo Rizzo, Castelveltrano, Trapani/Milo, and Sciacca Aiddromes. 3 325th Fighter Group P-40s down 3 Bf-109s over the Trapani/Milo Airdrome.

Air Operations, Solomons

- An attack by AirSols light bombers against Kolombangara and the Munda area is hampered by bad weather, but a number of bombers are able to attack the aifield at Munda Point on New Georgia.

Aleutians

On Attu the Japanese, already squeezed into the Chicagof Harbor area, take refuge in the surrounding mountains. The Americans drop leaflets inviting them to surrender.

Battle of the Atlantic

• U-304 is sunk by Liberator 'E' of No 120 Squadron RAF.

U-304

Class	Type VIIC
CO	Oberleutnant zur See Heinz Koch
Location	N Atlantic
Cause	Air attack
Casualties	46
Survivors	None

• U-154 attacks Brazil-to-Trinidad Convoy BT-14, torpedoing 3 US merchant ships: motor tanker Florida (8580t), freighter Cardinal Gibbons (7191t), and freighter John Worthington (8166t). Sumarine chaser PC-592 rescues all of the 52-man crew and the 27-man Armed Guard from the Florida.
• U-177 attacks Convoy CD-20 sinking the US freighter Agwimonte. There are no casualties among the 46-man crew or 23-man Armed Guard. The survivors are rescued by the South African whaler Vereeniging and an army crash boat.

Mediterranean

U-755 is attacked and sunk by Hudson 'M' of No 608 Squadron RAF. This the second U-boat to be sunk using rockets, and the first by the RAF.

U-755

Japanese Battleships Musashi (foreground) and Yamato (background) at Truk, Caroline Islands, May 1943

Japanese Battleships at Truk

Pacific

• The US submarine S-41 (SS-146) sinks the Japanese merchant cargo ship Asuka Maru off Paramushiro, Kuriles.
• The US submarine Saury (SS-189) torpedoes and sinks the Japanese fleet tanker Akatsuki Maru (10,216t) about 90 miles northwest of Okinawa.

United States, Home Front

The Office of War Mobilization is established to co-ordinate production.