On 6 June 2016, Federica Mogherini, the High Representative of the Union for Foreign Affairs and Security Policy (HR), asked to adopt a resolution on authorising Operation Sophia to enforce the UN embargo on the high seas, off the coast of Libya, during her speech at the UN Security Council. A few days prior, NATO Foreign Ministers met in cooperation with the European Union (EU) in Brussels, where the HR underlined the importance of collaboration with NATO in the Aegean Sea, looking at ways in which EU could work together with the Alliance to support the Operation Sophia in the Central Mediterranean. This close collaboration with NATO, and the achievement of the Security Council resolution 2292 (14 June 2016) about the arms embargo in Libya, shows the EU strong impact inside the two international organisations (IOs). This article will provide an explication about the EU role inside the two IOs, how it can affect their policies, and what the EU will do in the Central Mediterranean on the high sea, off the coast of Libya. (suite…)