General Assembly
The General Assembly held its 21st session, comprising the 1409th–1501st plenary meetings, at UN Headquarters from September 20 to December 20, 1966, during which time it took action on 98 agenda items and adopted 115 resolutions. During the session the Assembly unanimously admitted four new states to UN membership: Guyana on September 20, Botswana and Lesotho on October 17, and Barbados on December 9, 1966. In accordance with a telegram of September 19 from the Ambassador of Indonesia to the United States addressed to the Secretary-General in which he stated that his government had decided to resume full cooperation with the United Nations and to resume participation in its activities starting with the 21st session of the Assembly and upon the Assembly's expression of its agreement to that effect Indonesia resumed full participation in the work of the UN on September 28. The Organization's total membership thereby reached 122 during the session.