The agreement inaugurated closer Canadian-United States military co-operation and established the Permanent Joint Board of Defence, which remains as the senior advisory body on continental security and which is composed of two national sections made up of diplomatic and military representatives. For seven decades its meetings have served as a window on Canada-U.S.A. Defence relations. Canadian-U.S.A. military cooperation was further enhanced by the creation of the North Atlantic Treaty Organization (NATO) in 1949 but the Board continued to serve in an important capacity for bilateral military relations and coordination.