https://www.sipri.org/sites/default/files/2025-04/2504_fs_milex_2024.pdf
https://www.statista.com/chart/14636/defense-expenditures-of-nato-countries/
https://www.nato.int/nato_static_fl2014/assets/pdf/2024/6/pdf/240617-def-exp-2024-en.pdf
https://worldpopulationreview.com/country-rankings/nato-spending-by-country
https://www.reuters.com/world/europe/nato-countries-approve-hague-summit-statement-with-5-defence-spending-goal-2025-06-22/
https://www.atlanticcouncil.org/blogs/new-atlanticist/what-counts-as-defense-in-natos-potential-5-percent-spending-goal/
https://www.ft.com/content/35f490c5-3abb-4ac9-8fa3-65e804dd158f
https://www.twz.com/news-features/counter-drone-weapons-diverted-from-ukraine-to-middle-east-amid-rising-tensions-hegseth-confirms
https://data.worldbank.org/indicator/NY.GDP.MKTP.KD.ZG
https://www.reuters.com/world/nato-chief-rutte-floats-two-tier-spending-plan-meet-trump-target-2025-05-02/
https://www.romania-insider.com/dacian-spring-postponed-roads-apr-2025
https://www.ifw-kiel.de/publications/news/ukraine-support-europe-largely-fills-the-us-aid-withdrawal-lead-byn-the-nordics-and-the-uk/