A Forward Operating Site (FOS) or Forward Operating Location (FOL) is a U.S. military term for facilities, defined as "a scalable, 'warm' facility that can support sustained operations, but with only a small permanent presence of support or contractor personnel. A FOS will host occasional rotational forces and many contain pre-positioned equipment." These sites were established as the Pentagon began to address regional threats primarily in Africa and Latin America following its 2004 global posture review.