For the first time ever, the US military is deploying an active duty regular Army combat unit for full-time use inside the United States to deal with emergencies, including potential civil unrest.

Beginning on October 1, the First Brigade Combat Team of the Third Division will be placed under the command of US Army North, the Army’s component of the Pentagon’s Northern Command (NorthCom), which was created in the wake of the September 11, 2001 terrorist attacks with the stated mission of defending the US “homeland” and aiding federal, state and local authorities.

The unit—known as the “Raiders”—is among the Army’s most “blooded.” It has spent nearly three out of the last five years deployed in Iraq, leading the assault on Baghdad in 2003 and carrying out house-to-house combat in the suppression of resistance in the city of Ramadi. It was the first brigade combat team to be sent to Iraq three times.