The primary reason given by u. s. leaders to justify military involvement in vietnam was that it would (5 points)
a. promote reconstruction after world war ii
b. maintain the policy of d tente
c. fulfill prior united nations obligations
d. keep communism from spreading throughout the region

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.

the  wilmot proviso  was designed to eliminate  slavery  within the  landacquired as a result of the mexican war (1846-48). fearing the addition of a pro-slave territory, pennsylvania congressman david  wilmot proposedhis amendment to the bill.