Sea War
Atlantic: First successful U-boat Wolf-pack operation: three of the ‘ace’ commanders – Schepke (U-100), Prien (U-47) and Kretschmer (U-99) – scatter Convoy HX.72 in Northwestern Approaches and sink 12 ships totalling 77,900 t. (September 20-22).
Politics
Japanese ultimatum to Vichy authorities in French Indo-China, demanding air bases, use of Haiphong harbour and freedom to transport troops to China via Indo-China. (Vichy French agree September 22.)