At the Helsinki CSCE Follow-Up Conference at Summit Level, leaders of the 51 participating nations approve a Final Document

At the conclusion of the Helsinki CSCE Follow-Up Conference at Summit Level, leaders of the 51 participating nations approve a Final Document ("The Challenges of Change") addressing, inter alia, support for CSCE peace-keeping activities by NATO and other international organisations. The Concluding Act of the Negotiations on Personnel Strength of Conventional Armed Forces in Europe (CFE 1A), is also signed. The North Atlantic Council in Ministerial Session in Helsinki agrees on a NATO maritime operation in the Adriatic in coordination and cooperation with the operation by the WEU, to monitor compliance with UN sanctions imposed on Serbia and Montenegro by Security Council Resolutions 713 and 757.