Fort Stewart is a hub of military activity in the U.S., spanning thousands of acres and housing nearly 10,000 people.

At Fort Stewart, an active-shooter drill was conducted in 2011 that mimicked a real-life crisis with a fake shooter and hostage situation -- an exercise that had been discussed "since the shooting at Fort Hood," one of the organizers told Military Times.

A shooter was apprehended but part of the base still remains on lockdown. The base is home to the Army's 3rd Infantry Division.