Camp Santiago, located in Salinas, Puerto Rico, is a joint military training facility. Camp Santiago is the primary training facility for the U.S. Army, Army National Guard, U.S. Army Reserve and the Air National Guard in Puerto Rico for Annual Field Training Exercises each summer and monthly drills throughout the year. Army National Guard and Army Reserve units, U.S. Marine Corps Reserve units in Puerto Rico and Army and Air Force ROTC all hold training exercises at Camp Santiago as well.