https://rusi.org/sites/default/files/the_silent_threat_web_version.pdf
https://www.whitehouse.gov/wp-content/uploads/2021/03/NSC-1v2.pdf
https://www.aljazeera.com/news/2025/6/12/mapping-us-troops-and-military-bases-in-the-middle-east
https://www.politico.eu/article/cuban-mercenaries-join-russian-army-ukraine-war/