This project focuses on the prospects of the ASEAN Defence Ministers’ Meeting (ADMM) and ADMM-Plus to continue managing regional security challenges, as well as their contributions towards defence diplomacy and shaping the regional security architecture. It will also review the achievements of Singapore’s ADMM Chairmanship in 2018, and the progress of these initiatives in the year ahead. The scope of this project includes: (i) exploring how the ADMM and ADMM-Plus could continue contributing to regional security challenges, including the potential adoption of the Guidelines for Air Military Encounters by the ADMM-Plus; (ii) examining the pros and cons of the ADMM-Plus exercises thus far, and their impact on defence diplomacy; and (iii) reviewing the progress of initiatives that were implemented during Singapore’s ADMM Chairmanship.