In December 1983, the new Major General Muhammadu Buhari regime announced that Nigeria could no longer afford an activist anti-colonial role in Africa. Anglophone ECOWAS members established ECOMOG, dominated by the Nigerian Army, in 1990 to intervene in the civil war in Liberia. The Army has demonstrated its capability to mobilize, deploy, and sustain brigade-sized forces in support of peacekeeping operations in Liberia. Smaller army forces have been previously sent on UN and ECOWAS deployments in the former Yugoslavia, Guinea-Bissau, and Sierra Leone. This doctrine of African military intervention by Nigeria is sometimes called Pax Nigeriana.