Concept:Before the Organisation of African Unity (OAU) was formed in 1963, African states were divided into three main political groupings.
Explanation:These three groups were the Casablanca Group, the Brazzaville Group, and the Monrovia Group.
The Casablanca Group was more radical and supported continental unity.
The Brazzaville Group was moderate and favoured gradual cooperation.
The Monrovia Group also supported unity but with respect for the sovereignty of member states.
The OAU was created on May 25, 1963, with its headquarters in Addis Ababa, Ethiopia.
Answer:Casablanca, Brazzaville, and Monrovia.