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Index/Topics/Presidential use of martial authority

Presidential use of martial authority

The use of martial authority by U.S. presidents in various contexts, including war, insurrection, and labor unrest, and the consequences for civil liberties and federalism.

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2 results
Jan 15, 2026
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Which specific presidents formally declared martial law and in what years?

Two presidents are routinely identified in the historical record as having put the United States under forms of martial rule: Abraham Lincoln during the Civil War (beginning in 1861) and Franklin D. R...

Jan 15, 2026
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Which presidents invoked the Insurrection Act during Reconstruction and what were the specific circumstances for each invocation?

During Reconstruction the Insurrection Act was principally wielded by President Ulysses S. Grant to suppress organized white supremacist violence—most prominently the Ku Klux Klan—after Congress expan...

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