Part of the goal for US foreign policy is to promote peace and democracy.
the were several reasons for USSR decline.
1. the Economic Breakdown. USSR could not manage the economy well it put a lot of burden on its slow growing economy. their expenditure were more then their revenues. it was in proxy wars in various regions which proved costly to it.
2. Arms and Nuclear Race. USSR was in competition with USA in arms and nuclear race which was very expensive at that time with not developed technology. it burdened the economy more. it was not a success at first, many attempts were made to get success
3. Ideology. USSR's Ideology was the other reason for its decline. because their policies were very rigid and harsh. the decisions were carried out single highhandedly supreme leader. ideology (Communism) was very harsh and repressive.
4. harsh control and brutal policies lead to weak control of the other States so in DEC,1991 Soviet Union disintegrated into 15 countries.
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The Paris Peace talks began in May 1968 and concluded on January 27, 1973.
The negotiations started with the International Control Commission and was changed to International Commission of Control and Supervision to complete the accord. The Paris Peace Accords was a peace treaty titled Agreement on Ending War and Restoring Peace in Vietnam and signed by the United States, South Vietnam, Viet Cong and North Vietnam.