Britain: Ultra discovers that Rommel has left North Africa on sick leave.
New Guinea: Australian troops counter-attack at Ioribaiwa, north of Port Moresby.
Atlantic: 2 U-boat packs make repeated, but largely unsuccessful, attempts to destroy fast Convoy RB.1 off Newfoundland – which is wrongly believed to contain large troopships; 3 vessels and escorting destroyer Veteran sunk, September 25-26.
Pacific: Australian destroyer Voyager lost off Timor while attempting to land reinforcements for Australian-Dutch ‘Sparrow Force’, which is waging guerrilla campaign behind Japanese lines.
USA: First Liberty Ship – prefabricated, mass-produced merchant ship – launched 10 days after keel had been laid; at Portland, Oregon.