Guinea-Bissau: Polity Style: 1973-2023 24 Sep 1973 - 13 Mar 1977 Estado da Guiné-Bissau [1] 13 Mar 1977 - República da Guiné-Bissau [1] Independence recognized 10 Sep 1974. Last updated on: 29 Nov 2023; URL: www.archontology.org/nations/guinea_bissau/01_polity.php