The Anglo-Malayan Defence Agreement (AMDA) was set up in 1957 to provide a security umbrella for the newly independent Malaya. AMDA was a bilateral defence agreement. When Malaysia was created in 1963, AMDA was renamed the Anglo-Malaysian Defence Agreement and continued to provide some measure of security to the new federation. AMDA was later replaced with FPDA.
The original article can be found at Anglo-Malayan Defence Agreement and the edit history here.