With a combined total of 25 million troops across the 10 ASEAN and the eight ASEAN Defence Ministers' Meeting (ADMM)-Plus countries, the grouping accounts for a significant percentage of the world's military forces.

The 10 ASEAN defence ministers have signed off on the world's first multilateral Guidelines for Air Military Encounters (GAME) to improve the operational safety of air lanes. The new code applies to unplanned encounters between military aircraft over high seas and describes the need for communicating appropriately, maintaining a safe distance and avoiding reckless manoeuvres.