The Trump administration will deploy 5,200 soldiers to the U.S.-Mexico border as part of the newly launched Operation Faithful Patriot initiative to prepare for thousands of Central American migrants headed north, Pentagon and Homeland Security officials announced Monday afternoon.

Eight hundred of those troops have already been deployed from Fort Campbell and Fort Knox, according to U.S. Northern Command and North American Aerospace Defense Command Gen. Terrence John O’Shaughnessy.