Insurrection Act Law and Legal Definition

The Insurrection Act is the set of laws passed in 1807 that govern the U.S. President's ability to deploy troops within the U.S. to put down lawlessness, insurrection and rebellion.

The Act aims to limit Presidential power as much as possible, relying on state and local governments for initial response in the event of insurrection. The Act, with the Posse Comitatus Act limited and delayed Presidential powers for law enforcement.