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The 150-year-old law that governs military’s role in local law enforcement

  • The Posse Comitatus Act, enacted in 1878 after the Reconstruction era, limits the U.S. military's role in enforcing domestic laws.
  • The law reflects a long-standing American norm to keep law enforcement civilian, rooted in fears from the Revolutionary War and resistance to military control.
  • In 2023, a federal court found that the Trump administration breached federal law by deploying military personnel alongside federal officers during immigration operations in Los Angeles.
  • Trump deployed 800 military personnel to Washington D.C., labeling the city as "lawless" and in need of federal assistance, and he also considered activating the National Guard in additional cities such as Chicago, Baltimore, and New York.
  • The ruling did not require troop withdrawal, and the law remains shaped largely by executive policy due to scarce judicial precedent, leaving some enforcement limits unclear.
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42 Articles

LA Daily NewsLA Daily News
+19 Reposted by 19 other sources
Center

The 150-year-old law that governs military’s role in local law enforcement

A judge on Tuesday ruled Trump’s administration violated federal law and the Posse Comitatus Act of 1878 by sending troops to accompany federal agents on immigration raids this summer in Los Angeles.

·Los Angeles, United States
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Associated Press NewsAssociated Press News
+16 Reposted by 16 other sources
Lean Left

The 150-year-old law that governs military's role in local law enforcement

President Donald Trump’s recent actions have sparked debate over the Posse Comitatus Act, a law from 1878 that limits military involvement in domestic affairs.

·United States
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The Posse Comitatus Act is a federal law of almost 150 years that limits the role of the U.S. military in the enforcement of local laws. According to experts, it reflects, in its essence, the belief that law enforcement must remain in civilian hands, separated from military power. That belief has long been rooted in the United States.

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Index broke the news in Budapest, Hungary on Tuesday, September 2, 2025.
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