December 7 after dark: Operation Frankton. 10 British naval frogmen left a submarine on 5 two-seater kayaks and went up the Gironde to blow up ships in Bordeaux port. In December 11-12 night, two boats were sunk and three seriously damaged. Only 2 of the frogmen came back to England. The others were captured directly, or denounced by, French, and finally shot by the Germans.