 Following the ratification of the May 1997 Treaty of Friendship, Cooperation, and Partnership on friendship and division of the Black Sea Fleet, international tensions slowly eased off.With the treaty, Moscow recognized Ukraine's borders and territorial integrity, and accepted Ukraine's sovereignty over Crimea and Sevastopol.In a separate agreement, Russia was to receive 80 percent of the Black Sea Fleet and use of the military facilities in Sevastopol on a 20-year lease.