WASHINGTON, Sept. 14 - A joint series of exercises between Ukraine and the U.S. has ended and guided missile destroyer USS Donald Cook (DDG-75) has left the Black Sea, U.S. 6th Fleet announced on Monday.

Cook, which left the Black Sea on Sunday, was the largest American contribution to the Sea Breeze 2015 exercise off the coast of Ukraine. The focus of Sea Breeze 2015 was operations between U.S. and Ukraine, however the drills also included included participants from Bulgaria, Germany, Greece, Italy, Moldova, Romania, Sweden, Turkey and the U.K.