The National Guard is a reserve force of the U.S. military that is typically deployed by states in response to natural disasters, although it has been used in the past by presidents to help quell domestic unrest - including President George H.W. Bush during the Los Angeles riots in 1992.

President Donald Trump announced Monday that he is deploying the National Guard to Washington, D.C., and placing the city’s police department under federal control in an effort to boost public safety in the nation’s capital.

WASHINGTON — National Guard troops began arriving at the D.C. Armory on Tuesday morning to report for duty to carry out President Donald Trump's directive to address crime in the nation's capital.