 Operation Basalt, during the night of 3–4 October 1942, captured a prisoner, and Hardtack 7 was a failed British landing in December 1943.Sark was finally liberated on 10 May 1945, a full day after Guernsey.In August 1990, an unemployed French nuclear physicist named André Gardes, armed with a semi-automatic weapon, attempted an invasion of Sark.