The purpose of this research is to examine the close relationship between Laos and Vietnam during 1975 to 1997 basing on the hypothesis that both countries had a common ideology, and similar security issues and economic reforms. Ideas on interdependency and cooperation were applied theoretical framework in the research. Robert O. Keohane and Joseph S. Nye theories on interdependence and cooperation were used as outlines as the two countries moved toward communist socialism, economic reforms and foreign policy since the beginning of the cold war. Before proclaiming independence in 1975, both countries held a common communist ideology. This led them to provide sincere assistance in their military strategies, politics and foreign affairs so as liberate the countries from France and the United States. After receiving independence in 1975, Laos named itself the Lao People’s Democratic Republic while unified Vietnam was called the Socialist Republic of Vietnam. Both countries reached a new era of relationship through cooperating in economic reforms, political activities, and foreign policy within the framework of the United Nations, ASEAN and other international organizations. Within this context, Laos and Vietnam relied on the Friendship and Cooperation Treaty of 1977 until now.
