Records of the U.S. Arms Control and Disarmament Agency (RG 383)
This agency was created in 1961 to conduct, support and coordinate research for arms control and disarmament policy formulation. It prepared for and managed U.S. participation in international arms control and disarmament negotiations. ACDA was abolished in 1999 and its functions folded into the Department of State.
ACDA did not maintain a central filing system. Instead, each operating office maintained its own records. Using published sources such as agency reports and telephone books, organization manuals, and references in the records, researchers must identify the office or offices that dealt with the subject of research in order to locate documentation of interest.
You can search the National Archives Catalog for entries from RG 383 or see a description in the Guide to Federal Records.