The Missouri Compromise of 1820 temporarily settled issues related to which of the following previous territorial acquisitions?

The Gadsden Purchase, finalized in 1854, involved the acquisition of land from Mexico for the purpose of building a southern transcontinental railroad. This occurred well after the Missouri Compromise and did not relate to the earlier territorial divisions established by the Louisiana Purchase.

The Northwest Ordinance, enacted in 1787, established a framework for governing the Northwest Territory but predates the Missouri Compromise significantly. While it influenced the creation of new states and addressed slavery in that region, it did not directly pertain to the territorial adjustments resulting from the Louisiana Purchase.

The Mexican Cession, which followed the Mexican-American War and was formalized in 1848, involved territories acquired from Mexico but came after the Missouri Compromise. Thus, it was not a factor in the compromises made to balance slave and free states concerning the lands acquired in the Louisiana Purchase.