In the last seventy-five years, Ethiopia played a significant role in the maintenance of International peace and security. More than 35,000 officers, non-commissioned officers, other ranked troops, and private soldiers participated in the peacekeeping missions of Korea, Congo, Rwanda, Burundi, and Liberia. However, in the academic arena, historians do not pay significant attention to this issue. Therefore, in my study “The Ethiopian Peacekeeping Missions in Africa, 1960 to 2010: The Case of Congo, Rwanda, Burundi, And Liberia,” I intended to produce a well-substantiated and comprehensive body of historical knowledge on the Ethiopian contribution to international peacekeeping and her relations with international organizations regarding peacekeeping. Under this I try to reconstruct the history of Ethiopian contribution to international peacekeeping; study the diplomatic and military initiatives and efforts of Ethiopia for the maintenance of international peace and security; identify problems and achievements of Ethiopian peacekeeping missions from Congo to Liberia; investigate the diplomatic, military, and political significances of the Ethiopian participation in international peacekeeping from the point of Ethiopian national interest; to examine the change and continuity of the Ethiopian peacekeeping missions from 1960 to 2010; and to recount and assess significant issues and events in the history of Ethiopian peacekeeping missions. This dissertation is constructed based on archival evidence accessed from the Ministry of National Defense, the Ministry of National Defense Peacekeeping Main Department, and the UN archival collections. Historical facts from key informants, selected purposively from veterans of peacekeeping missions and senior diplomats collected through in-depth interviews also used for this study. To fill the gaps in archives and informants I consulted books, book chapters, articles, periodicals, and thesis and dissertations. The accounts collected through these methods were carefully examined, cross-checked, analyzed, and interpreted to reconstruct the Ethiopian contributions to the peacekeeping missions in Africa. Peacekeeping was the core of the Ethiopian multilateral foreign relations in the Imperial period and post-1991. The Ethiopian commitment to the maintenance of international peace and security was the result of a commitment to collective security, Pan-Africanism, and African solidarity. Protecting the national interest of the country was another motivating factor behind the Ethiopian peacekeeping missions. In the four peacekeeping missions discussed in this study, there were external and internal challenges that affected the peacekeeping missions of the country. However, there are also important achievements recorded overpassing these challenges. Besides maintaining international peace and security Ethiopia was beneficial financially, diplomatically, and in modernizing the national army of the country