The wilmot proviso called for

The Wilmot Proviso was an unsuccessful 1846 proposal in the United States Congress to ban slavery in territory acquired from Mexico in the Mexican–American War. The conflict over the Wilmot Proviso was one of the major events leading to the American Civil War.

The Wilmot Proviso wanted to ban slavery in the new territory acquired from Mexico in the Mexican-American War (1846.) It ultimately failed to be passed, and is considered by historians to be one of the major events leading up to the American Civil War.

Hope I could help! :)

to protect the united states' role as a world leader, president truman wanted to prevent the soviet union from spreading communism beyond its post-world war ii boundaries. he declared that the united states must assist any nations struggling to prevent a communist takeover.

there has only been 12 presidents. the 12th president is/was moon jae-in