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• At a conference with Emperor Showa, Japanese leaders decided to go to war with the United States, United Kingdom, and the Netherlands in early Dec 1941 should diplomatic relations with the US did not improve by 1 Dec. ww2dbase [CPC]
• Japanese passenger ship Kehi Maru hit a Soviet mine and sank 75 miles off Korea in the Sea of Japan; 131 were killed, 379 survived. ww2dbase [CPC]
• Soviet submarine ShCh-324 was lost in the Baltic Sea off Tallinn, Estonia; she had presumably hit a mine. All 38 aboard were killed. ww2dbase [ShCh-324 | CPC]
• Cordell Hull had learned, via Magic intercepts of Japanese messages to Kichisaburo Nomura, that 25 Nov 1941 was Japan's final deadline for the decision on war. ww2dbase [Cordell Hull | CPC]
• U-576 completed her first war patrol. ww2dbase [U-576 | CPC]

• Soviet submarine ShCh-214 sank Italian tanker Torcello in the Black Sea. ww2dbase [CPC]

• Joseph Rochefort's cryptanalytic team in US Territory of Hawaii detected improvements in security of Japanese naval communications and the recall of some of the merchant ships back to home waters. ww2dbase [Attack on Pearl Harbor | Pearl Harbor Navy Base and Ford Island Naval Air Station | Honolulu, Oahu | Detailed Timetable | CPC]

• Zuikaku departed Ariake Sea, southwestern Japan. ww2dbase [Zuikaku | Ariake Sea | CPC]

5 Nov 1941 Interactive Map