http://HTTPS://WWW.WHITEHOUSE.GOV/WP-CONTENT/UPLOADS/2017/12/NSS-FINAL-12-18-2017-0905-2.PDF
https://rusi.org/explore-our-research/publications/commentary/why-did-afghan-army-evaporate
https://www.thetimes.com/uk/defence/article/the-untold-story-of-british-military-chiefs-crucial-role-in-ukraine-3j2zpgrxg
https://www.brookings.edu/blog/order-from-chaos/2021/03/30/the-us-military-must-plan-for-encounters-with-private-military-companies/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=118778216&utm_source=hs_email