In New Guinea… American forces begin operations against Japanese positions at Hollandia and nearby. The US 1st Corps (General Eichelberger) lands at Aitape, Tanahmerah Bay and Humboldt Bay. The American force totals 84,000 men. Task Force 77 (Admiral Barbey) provides transport for the landing force. Cruiser forces under the command of Admiral Crutchley and Admiral Berkey provide a covering force. Task Force 58 (Admiral Mitscher) provides additional naval support. The Japanese forces number 11,000 under the command of General Adachi. The operation proves a surprise and the Japanese retire inland.

In the Marshall Islands… US forces occupy Ungelap Island, completing the campaign.

In China… Japanese forces capture Chengchow (Honan).