http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:52016DC0950&from=en
https://csis-website-prod.s3.amazonaws.com/s3fs-public/2023-06/230616_Bergmann_Transforming_Defense.pdf
https://www.brookings.edu/blog/order-from-chaos/2021/06/14/the-future-of-nato-in-an-order-transformed/