What countries were fighting in the vietnam war?
North Vietnam, South Vietnam, the U.S., South Korea, Australia, Cambodia, and possibly China and the Soviet Union. Some other countries, notably Taiwan and the Philippines participated without introducing combat troops. Added: A lot of countries participated in the earlier Korean War, which was technically fought under the authorization and resources of the United Nations. These included Canada, Australia, India, the U.K. and many others. The Vietnam War was conducted as an action of the Southeast Asia Treaty Organization (SEATO), an organization similar in concept to NATO. To my knowledge the conflict in Laos was an extension of the Vietnam War but was also a separate conflict. Part of the Ho Chi Minh Trail was in Laos (part of it was also in Cambodia.) Laotian troops never participated officially in South Vietnam as combatants, as far as I know, although some may have engaged Viet Cong or North Vietnamese in Laos or North Vietnam. Laos was also heavily involved in opium trafficking,
