A body of fundamental principles or established precedents according to which a state or other organization is acknowledged to be governed.
 
        
             
        
        
        
<span>President Kennedy had decided to confront Cuba and the Soviets about the missiles that were discovered in their territory.
I hope this helps.
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Answer:
1) In january 1973, the United States and North Vietnam concluded the last peace treaty, ending open hostilities between the two nations. War between North and South Vietnam continued, however, until April 30, 1969.
2) Nixon visited China to gain more leverage over the relationship with the Soviet Union. The normalization of ties culminates in 1979, when the U.S. established full diplomatic relations with the  PVR.
Explanation:
 
        
             
        
        
        
The answer to your question will be 3