What were the three compromises on slavery?

The three key compromises on slavery in U.S. history are the Missouri Compromise of 1820, the Compromise of 1850, and the Kansas-Nebraska Act of 1854. The Missouri Compromise allowed Missouri to enter as a slave state while Maine entered as a free state, and established a boundary for slavery in the Louisiana Territory. The Compromise of 1850 admitted California as a free state while allowing popular sovereignty in other territories and included the Fugitive Slave Act. The Kansas-Nebraska Act repealed the Missouri Compromise, allowing settlers in those territories to determine the status of slavery through popular sovereignty, leading to significant conflict known as "Bleeding Kansas."