What issue did the Missouri Compromise of 1820, the Compromise of 1850, and the Kansas-Nebraska Act all concern?

The compromise also included a more stringent Fugitive Slave Law and banned the slave trade in Washington, D.C. The issue of slavery in the territories would be re-opened by the Kansas–Nebraska Act, but many historians argue that the Compromise of 1850 played a major role in postponing the American Civil War

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