Depending on their size or utility, the installations were called: camp,
forward operating bases (FOBs), contingency operating bases (COBs), contingency operating sites (COSs), combat outposts (COPs), patrol base (PBs), logistic bases (log bases), fire bases (FBs), convoy support centers (CSCs), logistic support areas (LSAs), and joint security stations (JSSs). Near the end of
Occupation of Iraq (2003–2011), the last several camps and forward operating bases were changed to contingency operating bases and sites. At the height of the occupation, the US had 170,000 personnel in uniform stationed in 505 bases throughout all provinces of Iraq. Another 135,000 private military contractors were also working in Iraq. Due to
International military intervention against ISIL, personnel returned to old bases and new bases were created. Control of many U.S.-operated bases was transferred to the Iraqi government during the
2020–2021 U.S. troop withdrawal. At the request of the Iraqi government in January 2024, and amid rising regional tensions following the
2023 Israeli invasion of Gaza, the US and Iraq were set in January 2024 to begin negotiations to end US military presence in Iraq. ==Airfields==