Kansas–Nebraska Act
The Kansas–Nebraska Act of 1854 made the territories of Kansas and Nebraska, allowing the states to vote on whether slavery was legal or not. This law canceled the Missouri Compromise, which declared that slavery was not legal in those areas. It was passed on May 30, 1854. The Kansas-Nebraska Act angered many in the North who considered the Missouri Compromise to be a long-standing agreement. In the pro-slavery South, it was strongly supported.