https://www.politico.eu/article/cuban-mercenaries-join-russian-army-ukraine-war/
https://www.ips-journal.eu/index.php?id=340&L=0&tx_news_pi1%5Bnews%5D=4046&tx_news_pi1%5Bcontroller%5D=News&tx_news_pi1%5Baction%5D=detail&utm_source=newsletter&utm_medium=email&utm_campaign=en_747_20200204&cHash=35fc16b2af9313e0412b2e01aa3095bd
http://henryjacksonsociety.org/wp-content/uploads/2018/05/Global-Britain-in-the-Indo-Pacific-WEB.pdf
https://www.brookings.edu/blog/order-from-chaos/2023/01/27/syrias-dissolving-line-between-state-and-nonstate-actors/