Vietnam is a country with a small area but has experienced many long and brutal wars in history. After defeating the American imperialists in 1975, Vietnam was also influenced by some other wars. The war has had a great impact on all areas, including politics, economics, culture, society, and diplomacy, not only in Vietnam but also in the United States and some other countries. Vietnam has suffered severe consequences and they continue to persist until today. It is the loss of people, facilities, long-term sequelae of Agent Orange for human health and the environment; the consequences of mines, explosives left over after the war... This book is a research topic of cooperation between Vietnam and other countries and international organizations in dealing with some of the consequences of the war including the following issues: Addressing the consequences of chemical warfare; Addressing the consequences of mines, explosives; Resolving the issue of prisoners, people missing in war.