Republic of Guinea-Bissau
Who & why: the PAIGC unilaterally declares independence on 24 September 1973, months after Amílcar Cabral's January 1973 assassination robs him of the moment he had spent a decade building toward. Portugal does not recognize it at first, but the April 1974 Carnation Revolution topples the Estado Novo dictatorship in Lisbon, and the new Portuguese government formally recognizes Guinea-Bissau's independence on 10 September 1974. Luís Cabral, Amílcar's half-brother, becomes the first president.
What it represents: the flag adopted at independence (Wikipedia gives 24 September 1973, Flags of the World the constitution of 23 September) is the PAIGC's party flag without the party initials that the party version carries beneath the star: Pan-African red, yellow and green with a black star on the red hoist band, taken from the flags of Ghana and Guinea-Conakry. Flags of the World describes the short-lived Guinea-Bissau and Cape Verde connection through the PAIGC, which broke apart.
Wikipedia: the flag was adopted on 24 September 1973, the day of the proclamation of independence; it is almost identical to the flag of the PAIGC, which has the party initials under the star; the black star symbolises the party's leadership. FOTW: the National Assembly proclaimed independence and the first constitution on 23 September 1973, whose article 2 describes the flag; the party flag is the national flag with the party sigla beneath the star; the flag follows Ghana's pan-African colours with the black star.
- Flag of Guinea-Bissau — Wikipedia compiled
- Guinea Bissau — Flags of the World (CRW Flags) compiled
- P.A.I.G.C. party (Guinea-Bissau) — Flags of the World (CRW Flags) compiled
Not established: The national flag is the PAIGC flag without the initials, not 'unchanged'. The independence date differs by a day (23 or 24 September 1973). FOTW calls the Guinea-Bissau and Cape Verde link a short-lived confederacy that broke apart over conflicts between the two peoples; Wikipedia does not mention it.