Setting in motion the events later known as "Bleeding Kansas" was the Kansas–Nebraska Act. The Act created the territories of Kansas and Nebraska, opened new lands that would help settlement in them, repealed the Missouri Compromise, and allowed settlers in those territories to determine through popular sovereignty whether to allow slavery within their boundaries. It was hoped the Act would ease relations between the North and the South, because the South could expand slavery to new territories, but the North still had the right to abolish slavery in its states. Instead, opponents denounced the law as a concession to the slave power of the South.