German and Romanian troops under German General Erich von Manstein seize the 7 km-wide Perekop Isthmus, linking the Crimean peninsula to the Ukrainian mainland. Soviet forces are now isolated on the Crimea itself and the major Ukrainian Black Sea port of Odessa.
At 7.44 AM 500 miles North of the Azores, U-124 sinks British SS Empire Stream carrying 3730 tons of potash (8 dead and 27 survivors picked up by British corvette HMS Begonia and landed at Milford Haven on September 30).
To prevent a breakout by Soviet Fleet from the Gulf of Finland, newly-formed German Baltic Fleet (battleship Tirpitz, battlecruiser Admiral Scheer, cruisers Köln and Nürnberg, 3 destroyers and 5 torpedo boats) patrols the Baltic Sea. Admiral Scheer is damaged when 2 depth charges explode on the deck (returns to Blohm & Voss shipyard at Hamburg via the Kiel Canal for repairs until October 24).
John F Kennedy enlists in the US Navy.