Taking place after the EU-Western Balkans Summit in Sofia were the six flagship initiatives for the region were introduced, including the Initiative to Reinforce Engagement on Security and Migration (European Commission 2018), the London Summit provides a solid basis to pose the question: where does the Western Balkans fit into the overall EU security architecture? Within this context, the paper aims at analyzing and exploring ways of cooperation between Western Balkan (WB) countries and the EU in the security sector. Moreover, it aims at analyzing the capacities of Western Balkan countries to work conjointly with the EU in successfully tackling security challenges in the region and seeks ways totransform the region from a security consumer to a security provider.