The Warsaw Summit was held on 8-9 July 2016 with the assumption of “an essential Alliance in a more dangerous world” both in the eastern and in the southern flanks. Bearing in mind that the allies gathered in “a defining moment for the security of our nations and populations”, this contribution aims to analyse the main decisions of the Warsaw summit towards a ‘new’ NATO 360? full spectrum approach based on agility, flexibility and readiness. Moreover, as collective defence, crisis management and cooperative security remain the key core areas of NATO, this paper will also explore some critical insights to address eastern flank challenges from the southern perspective. We will conclude that an enhanced cooperation and full engagement between NATO and the EU as agreed in the final communiqu? are crucial for security and defence of all borders.