The Black Sea Rotational Force is a yearly program where United States Marine Corps units based in the continental United States perform rotational deployments to U.S. military bases on the Black Sea region. Black Sea Rotational Force participates in security cooperation to build military capacity, provide regional stability, and develop lasting partnerships with nations in the region. It is an outgrowth of the previous Joint Task Force East, which was planned to be a rotational brigade-sized Army force.