Security and defence policy in the European Union is predominantly a competence of the Member States. At the same time, a common security and defence policy, which could progressively lead to a European defence union, is enshrined in the Lisbon Treaty and significant progress has been made in that direction. This briefing discusses the EU's deliveries in the area of security and defence policy and analyses public expectations and perceptions of the EU's actions in this policy field.
https://www.europarl.europa.eu/thinktank/en/document.html?reference=EPRS_BRI(2019)635533
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