Answer:
The federal government authorized the use of military force against states that challenged federal tariff laws under the Enforcement Acts. The Enforcement Acts were a series of federal laws enacted by the U.S. Congress in the 1870s and aimed at combating civil rights violations, including actions by the Ku Klux Klan and other groups targeting African Americans during the Reconstruction era. These acts granted federal authorities the power to use military force to suppress insurrections, protect civil rights, and enforce federal laws, including tariff laws, in states that resisted or obstructed their enforcement.
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