Answer:
The Kansas-Nebraska act in 1854 brought antislavery and proslavery proponents head-to-head in a battle over the status of Kansas. Slavery had been prohibited in the Great Plains territories under the Missouri Compromise of 1820. With the Kansas-Nebraska Act, the Nebraska territory was divided into north and south, and the question of whether slavery would be legal in either part was left to popular referendum.
Step-by-step explanation: