The Cameroon flag was officially adopted on May 20th, 1975, and the pattern reflects the French Tricolore.
The red symbolizes unity, as well as the centered yellow star. Green represents hope and the yellow prosperity. Those colors combined are the official Pan-African colors.
Cameroon Coat of Arms:
Cameroon's coat of arms contains a shield depicting the national flag, as well as the scales of justice superimposed on a map of the nation.
Two crossed fasces rest behind the shield, and the national motto is displayed above.