The Soviet Union supported the Democratic Republic of Vietnam (North Vietnam) under Ho Chi Minh.
Communist North Vietnam was supported by the Soviet Union and, later, by the People's Republic of China against the Capitalist US-supported South Vietnam.
"Supported neither the United States nor the Soviet Union" regions C and D
the Soviet Union
The U.S. mainly supported the South but Australia and some neutral countries supported the South as well. The Soviet Union and China mainly supported the North.
North Vietnam was supported by Soviet Union money and military equipment. Help also came from China, and later from Cuba. South Vietnam, as a member of the South East Asia Treaty Organization (SEATO), was supported by the United States, Canada, South Korea, Australia, and the Philippines.
Communist North Vietnam was supported by the Soviet Union and, later, by the People's Republic of China against the Capitalist US-supported South Vietnam.
The Vietnam war is also called the Second Indochina War. The war was fought by between North Vietnam who were supported by China and Soviet Union and South Vietnam which was supported by the United States.
"Supported neither the United States nor the Soviet Union" regions C and D
Russia (or USSR or Soviet Union)
If you're referring to the Vietnam War, then the war was mainly fought between North Vietnam and South Vietnam. North Vietnam was communist, and was supported by the Soviet Union, China, and Cuba. South Vietnam was capitalist, and was supported by the United States, Australia, the Philippines, and South Korea. Vietnam was also invaded and conquered, then colonized, by France in the 1800s.
the Soviet Union
During the Vietnam War, the United States supported South Vietnam, officially known as the Republic of Vietnam, in its fight against the communist North Vietnam, backed by the Soviet Union and China. In the Korean War, the US supported South Korea, officially the Republic of Korea, in its defense against the communist North Korea, which was backed by China and the Soviet Union. This support was part of the broader strategy of containment during the Cold War to prevent the spread of communism in Asia.
the Soviet Union
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The U.S. mainly supported the South but Australia and some neutral countries supported the South as well. The Soviet Union and China mainly supported the North.
North Vietnam was supported by Soviet Union money and military equipment. Help also came from China, and later from Cuba. South Vietnam, as a member of the South East Asia Treaty Organization (SEATO), was supported by the United States, Canada, South Korea, Australia, and the Philippines.
The phrase is simply used to show that just as the American's suffered devastating losses in Vietnam, the Soviet Union had crushing losses in Afghanistan.