A Defense alliance is a strategic partnership between two or more nations that commits to defend one another militarily in the event of war. Alliances can be bilateral or multilateral, permanent or temporary and may involve military forces as well as political and economic measures. Security alliances are an important element of global security architecture, whether established as ad hoc arrangements in response to specific threats (eg alignments, ententes and coalitions) or permanent structures such as NATO. In addition, geographically limited regional organizations that have a security dimension can function as security alliances.
The Alliance remains focused on addressing the most direct asymmetric threat to the security of NATO citizens – terrorism in all its forms and manifestations. In addition, instability in the Alliance’s southern neighbourhood – the Middle East, North Africa and Sahel region – poses interconnected security, demographic and economic challenges, exacerbated by climate change, fragility, health emergencies and food insecurity. Russia’s continued violation of international law, proliferation and aggression also pose serious risks to NATO and its Allies.
In this changing environment, the Alliance will continue to adapt its deterrence and defence posture. At the 2023 Vilnius and 2024 Washington Summits, Allied Leaders agreed on significant progress towards strengthening NATO’s defence capabilities in all domains. They committed to achieving NATO’s defence plans and enhancing its readiness to respond rapidly in the face of emerging threats, while continuing to invest in new technologies. This is essential for the Alliance’s ability to sustain its competitive advantage and remain resilient in the face of evolving threats.