
https://www.ips-journal.eu/topics/foreign-and-security-policy/the-world-of-tomorrow-7101/

https://sipri.org/media/press-release/2018/global-military-spending-remains-high-17-trillion

https://www.brookings.edu/blog/order-from-chaos/2021/06/14/the-future-of-nato-in-an-order-transformed/