A cooperative security location (CSL) is a U.S. military term for facilities used for regional training in counterterrorism and interdiction of drug trafficking, and also to provide contingency access to continental areas.
"A CSL is a host-nation facility with little or no permanent U.S. personnel presence, which may contain equipment and/or logistical arrangements and serve for security cooperation activities and contingency access.
"[1] These sites were established as the Pentagon began to address regional threats primarily in Africa and Latin America following its 2004 global posture review.
[3] The establishment of such bases accelerated under the Obama administration, especially with the pivot to the Asia-Pacific region and increased operations in Africa.
[5] These sites were created while Africa was in the region covered by United States European Command.