Building on previous counter-piracy missions conducted by NATO, Operation Ocean Shield focused on at-sea counter-piracy operations off the Horn of Africa. Approved on 17 August 2009 by the North Atlantic Council, this operation contributed to international efforts to combat piracy in the area. It also offered, to regional states that requested it, assistance in developing their own capacity to combat piracy activities. There were no successful piracy attacks from May 2012 onwards, but even though Somalia-based piracy was suppressed, it had not been eliminated. During the periods without surface ships, maritime patrol aircraft continued to fly sorties, and links to situational awareness systems and counter-piracy partners remained in place. In this effort, the NATO Shipping Centre played a key role. Ocean Shield was terminated on 15 December 2016 after having achieved its objectives.