The aim and objective of this paper is the presentation of only the second major involvement of an African regional organisation in the internal affairs of a member state. The civil war in Liberia is significant for two reasons. First, it served as an important example of a new type of external intervention – intervention by a subregional organisation. Second, it has led to a re-examination by African leaders, of the policy of non-interference in the internal affairs of states. Non-intervention in the internal affairs of states is one of the principles underlying the OAU.