Operation Ambassador was an operation carried out by British Commandos on 14–15 July 1940 within the context of the Second World War. It was the second raid by the newly formed British Commandos and was focused upon the German-occupied Channel island of Guernsey. The raiding party consisted of 40 men from the newly formed No. 3 Commando under the command of Lieutenant Colonel John Durnford-Slater, and 100 men of No.11 Independent Company under Major Ronnie Tod.