1956 (MCMLVI) was a leap year starting on Sunday (link will display full calendar) of the Gregorian calendar. Events of 1956 January January 1 – The Anglo-Egyptian Condominium ends in Sudan. January 8 – Operation Auca: Five U.S. missionaries are killed by the Huaorani of Ecuador shortly after making contact with them. January 16 – Egyptian leader Gamal Abdel Nasser vows to reconquer Palestine. January 25–26 – Finnish troops reoccupy Porkkala after Soviet troops va… (More on 1956)