https://rusi.org/sites/default/files/20200324_defence_and_integrated_review_readyforweb.pdf
https://d2071andvip0wj.cloudfront.net/B004-covid-19-seven-trends.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.brookings.edu/articles/why-do-us-presidents-like-military-assistance/