https://www.nato.int/nato_static_fl2014/assets/pdf/2021/6/pdf/210611-pr-2021-094-en.pdf
https://lawliberty.org/enlarge-nato-to-defend-the-west-and-the-rest/
https://visegradinsight.eu/between-the-eastern-flank-and-mitteleuropa/
https://www.telegraph.co.uk/business/2023/07/08/president-joe-biden-anti-britain-nato-special-relationship/