Around two dozen soldiers stood guard outside Washington, Union Station in Washington, D.C., on Aug. 14. They had little to do.

National Guard troops scaled up their presence in D.C. Thursday, with several stationed around the National Mall, at Union Station, on the subway, and other places.

Dressed in camouflage fatigues, National Guard troops patrolled areas of Washington Thursday, dispatched by President Donald Trump to police what he has called "out of control crime" in the city.

National Guard troops set up outside D.C.'s Union Station as their presence ramps up in the nation's capital as part of the Trump admin's efforts to tamp down on crime. (Alec Schemmel/Fox News Digital

National Guard troops deployed to D.C. will assist law enforcement in a variety of roles, but aren't making arrests, officials said.

Trump's plan to address crime in D.C. calls for deploying National Guard troops along the National Mall overnight Wednesday into Thursday morning, according to a source.

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The Army activated the D.C. National Guard under Title 32, the service said. Of the 800 Guard members activated, between 100-200 troops will be supporting law enforcement at any given time. Their duties will include an array of tasks from administrative, logistics and physical presence in support of law enforcement, the Army said.

Outside the busiest train station in Washington, newly deployed National Guard troops wearing camouflage lean on a huge military Humvee.

The National Guard started ramping up its presence in Washington on Thursday, deploying troops to the National Mall and Metro stations as President Trump’s takeover of city crime-fighting