Compromise: A compromise is an agreement where both sides make concessions in order to reach a middle ground. The attempt to settle disputes over slavery expansion involved various compromises that aimed to satisfy both pro-slavery and anti-slavery factions.
Popular sovereignty: Popular sovereignty is the principle that allows residents of a territory or state to decide for themselves whether or not they want to allow slavery. This concept was used as a potential solution in some attempts at resolving disputes over slavery expansion.
Kansas-Nebraska Act: The Kansas-Nebraska Act was an 1854 legislation that allowed settlers in these territories to determine through popular sovereignty whether they would permit slavery. It was one of the attempts made by Congress to address disputes over slavery expansion following the Mexican-American War.