European Union membership: How countries join, and more | Pew Research Center
Ukraine War: Russia warns Sweden and Finland against Nato membership - BBC News
Europeans Retreat on Defense Spending - WSJ
Ranked: The Top 10 Countries by Military Spending
How European countries stand on 2% of GDP defence spending | Euronews
Preventing a Wider European Conflict | Council on Foreign Relations
World military expenditure passes $2 trillion for first time | SIPRI
Chart: Will NATO Expand North? | Statista
EU mulls mission to train Ukraine's military – DW – 08/30/2022
The US military presence in Europe has been declining for 30 years – the current crisis in Ukraine may reverse that trend
Arming the EU — The long road towards a united defence
European Democracy Support Annual Review 2021 - Carnegie Europe - Carnegie Endowment for International Peace
A Visual Guide to Europe's Member States
Nuclear Power in the European Union - World Nuclear Association
A Visual Guide to Europe's Member States
European Union | Definition, Flag, Purpose, History, & Members | Britannica
Animation: How the European Map Has Changed Over 2,400 Years
Ukraine war follows decades of warnings that NATO expansion into Eastern Europe could provoke Russia
Why Russian Military Expenditure Is Much Higher Than Commonly Understood (As Is China's) - War on the Rocks
Balkans enhance the expansion of their military – GIS Reports
Independence play: Europe's pursuit of strategic autonomy – European Council on Foreign Relations
Infographic: NATO's members, mission and tensions with Russia | Infographic News | Al Jazeera
China's Influence in Southeastern, Central, and Eastern Europe: Vulnerabilities and Resilience in Four Countries - Carnegie Endowment for International Peace
EU army myth: what is Europe really doing to boost defence? | News | European Parliament
