150517-N-PZ713-169 SAN DIEGO Sailors aboard the Military Sealift Command hospital ship USNS Mercy man the rails as the ship departs for Pacific Partnership 2015. Pacific Partnership is in its tenth iteration and is the largest annual multilateral humanitarian assistance and disaster relief preparedness mission conducted in the Indo-Asia-Pacific region. While training for crisis conditions, Pacific Partnership missions to date have provided real-world medical care to approximately 270,000 patients and veterinary services to more than 38,000 animals. Critical infrastructure development has been supported to host nations during more than 180 engineering projects.