A forward operating site (FOS) or forward operating location (FOL) is a

U.S. military The United States Armed Forces are the military forces of the United States. U.S. federal law names six armed forces: the Army, Marine Corps, Navy, Air Force, Space Force, and the Coast Guard. Since 1949, all of the armed forces, except th ...

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 as opposed to a FOB or MOB. A FOS will host occasional rotational forces and many contain pre-positioned equipment." These sites were established as

the Pentagon The Pentagon is the headquarters building of the United States Department of Defense, in Arlington County, Virginia, across the Potomac River from Washington, D.C. The building was constructed on an accelerated schedule during World War II. As ...

began to address regional threats primarily in

Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...

and

Latin America Latin America is the cultural region of the Americas where Romance languages are predominantly spoken, primarily Spanish language, Spanish and Portuguese language, Portuguese. Latin America is defined according to cultural identity, not geogr ...

following its 2004 global posture review. An FOS is differentiated from a cooperative security location (CSL) with no permanent force or contractor personnel, or a

forward operating base A forward operating base (FOB) is any secured forward operational level military position, commonly a military base, that is used to support strategic goals and tactical objectives. A FOB may contain an airbase, hospital, machine shop, and othe ...

(FOB) and main operating base (MOB), with a large force and a well-defended site.

Locations

They include, but are not limited to the following locations:

Asia

* Paya Lebar Airfield,

Singapore Singapore, officially the Republic of Singapore, is an island country and city-state in Southeast Asia. The country's territory comprises one main island, 63 satellite islands and islets, and one outlying islet. It is about one degree ...

Caribbean

Curaçao International Airport Curaçao International Airport (, ), also known as Hato International Airport (formerly Dr. Albert Plesman International Airport), is the only airport for the Dutch Caribbean island of Curaçao, in the southern Caribbean Sea. The airport is lo ...

Curaçao Curaçao, officially the Country of Curaçao, is a constituent island country within the Kingdom of the Netherlands, located in the southern Caribbean Sea (specifically the Dutch Caribbean region), about north of Venezuela. Curaçao includ ...

Kingdom of the Netherlands The Kingdom of the Netherlands (, ;, , ), commonly known simply as the Netherlands, is a sovereign state consisting of a collection of constituent territories united under the monarch of the Netherlands, who functions as head of state. The re ...

Queen Beatrix International Airport Queen Beatrix International Airport (; ) Is an international airport located in the Dutch Caribbean island of Aruba. It has flight services to the United States, Canada, several countries in the Caribbean, the northern coastal countries of Sout ...

Aruba Aruba, officially the Country of Aruba, is a constituent island country within the Kingdom of the Netherlands, in the southern Caribbean Sea north of the Venezuelan peninsula of Paraguaná Peninsula, Paraguaná and northwest of Curaçao. In 19 ...

Central America

* Soto Cano AB,

Honduras Honduras, officially the Republic of Honduras, is a country in Central America. It is bordered to the west by Guatemala, to the southwest by El Salvador, to the southeast by Nicaragua, to the south by the Pacific Ocean at the Gulf of Fonseca, ...

Europe

RAF Fairford Royal Air Force Fairford or more simply RAF Fairford is a Royal Air Force (RAF) List of Royal Air Force stations, station in Gloucestershire, United Kingdom. While being an RAF station, Fairford hosts United States Air Force personnel. Since 20 ...

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...

Bulgaria Bulgaria, officially the Republic of Bulgaria, is a country in Southeast Europe. It is situated on the eastern portion of the Balkans directly south of the Danube river and west of the Black Sea. Bulgaria is bordered by Greece and Turkey t ...

, see List of joint US-Bulgarian military bases * Mihail Kogălniceanu Air Base,

Romania Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to ...

Africa

Camp Lemonnier Camp Lemonnier is a United States Naval Expeditionary Base, situated next to Djibouti–Ambouli International Airport in Djibouti City, and home to the Combined Joint Task Force – Horn of Africa (CJTF-HOA) of the U.S. Africa Command (AFRICOM). ...

Djibouti Djibouti, officially the Republic of Djibouti, is a country in the Horn of Africa, bordered by Somalia to the south, Ethiopia to the southwest, Eritrea in the north, and the Red Sea and the Gulf of Aden to the east. The country has an area ...

Morocco Morocco, officially the Kingdom of Morocco, is a country in the Maghreb region of North Africa. It has coastlines on the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria to Algeria–Morocc ...

Tunisia Tunisia, officially the Republic of Tunisia, is a country in the Maghreb region of North Africa. It is bordered by Algeria to the west and southwest, Libya to the southeast, and the Mediterranean Sea to the north and east. Tunisia also shares m ...

References

{{reflist Military installations