What did the fugitive slave act require of northern citizens?

The Act was one of the most controversial elements of the 1850 compromise and heightened Northern fears of a "slave power conspiracy." It required that all escaped slaves, upon capture, be returned to their masters and that officials and citizens of free states had to cooperate.

Passed on September 18, 1850 by Congress, The Fugitive Slave Act of 1850 was part of the Compromise of 1850. The act required that slaves be returned to their owners, even if they were in a free state. The act also made the federal government responsible for finding, returning, and trying escaped slaves.

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russia because it is the biggest state