Prior to the outbreak of the Civil War, the election of 1860 increased sectional tensions of the United States by lifting pro-union, anti-slavery statesman, Abraham Lincoln into the Presidency. In reaction, the Southern States protested in many ways, but in no more dramatic way than, one by one, seceding.
To contain communism, thinking was Vietnam went comunist it would spread more globally.
Explanation:
In December 1917, Germany agreed to an armistice and peace talks with Russia, and Lenin sent Leon Trotsky to Brest-Litovsk in Belarus to negotiate a treaty. The talks broke off after Germany demanded independence for Russian holdings in Eastern Europe, and in February 1918 fighting resumed on the eastern front.