https://www.whitehouse.gov/wp-content/uploads/2021/03/NSC-1v2.pdf
http://sro.sussex.ac.uk/id/eprint/110932/1/BP-70.pdf
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
https://www.sipri.org/sites/default/files/European-Union-weapons-mass-destruction.pdf