In Malaysia, the Malaysian military is responsible for defense of the country's national interests, sovereignty, and territorial integrity; it also has some domestic responsibilities, such as responding to natural disasters; key areas of focus for the military include cyber defense, crime and piracy in the Strait of Malacca, and tensions in the South China Sea; the Army has traditionally been the dominant service, but air and maritime security have received increased emphasis in recent years; Malaysia has undertaken efforts to procure more modern aircraft and ships, improve air and maritime surveillance, expand the Navy’s support infrastructure (particularly bases/ports) and domestic ship-building capacities, and increase cooperation with regional and international partners such as Australia, Indonesia, the Philippines, Singapore, and the US

Malaysia is a member of the Five Powers Defense Arrangements (FPDA), a series of mutual assistance agreements reached in 1971 embracing Australia, Malaysia, New Zealand, Singapore, and the UK; the FPDA commits the members to consult with one another in the event or threat of an armed attack on any of the members and to mutually decide what measures should be taken, jointly or separately; there is no specific obligation to intervene militarily (2025)