What did the Wilmot Proviso propose regarding territories acquired during the Mexican-American War?

The Wilmot Proviso proposed that slavery be prohibited in any territories acquired from Mexico during the Mexican-American War. This legislative proposal was introduced by Congressman David Wilmot in 1846 and was rooted in the growing tensions between pro-slavery and anti-slavery factions in the United States. The intent was to limit the expansion of slavery into the new territories, reflecting the increasing concern over the balance of power between slave and free states. The Proviso sparked significant debate and conflict in Congress, highlighting the sectional divides that would eventually lead to the Civil War. By suggesting that these territories would not allow any slavery, the Proviso addressed fears that the extension of slavery would alter political power dynamics and social structures in the newly acquired lands.