The GCC states are adapting defence strategies to the challenges raised by their "Visions", their post-hydrocarbon national plans. Far from being just economic programmes, the Visions are broad national transformation platforms displaying also a security dimension, and with many security implications. New cities and industrial poles, infrastructures, mega events and tourism raise unprecedented security risks, at which the GCC states are answering through a combination of economic-oriented foreign policy, multipolar international alliances, and ambitions towards "defense autonomisation". What are the Visions' security dimensions and implications, and how does the post-oil path affect and reshape foreign policies? This Report analyses how GCC states are adapting deterrence and defence tools to the connectivity age, navigating a troubled neighbourhood of both conventional and asymmetric threats. In a central but more vulnerable Gulf, how may the EU and NATO accommodate transformations in GCC states' defense policies, postures, and means, to support their own security?