In Singapore, the SAF’s primary responsibility is external defense, particularly maritime security, but it also trains for certain domestic security operations, including joint deterrence patrols with police in instances of heightened terrorism alerts; the Army includes a “people’s defense force,” which is a divisional headquarters responsible for homeland security and counterterrorism; the SAF regularly participates in bilateral and multilateral training exercises

Singapore 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; Singapore also has close security ties with the US, including granting the US military access, basing, and overflight privileges

the SAF's roots go back to 1854 when the Singapore Volunteer Rifle Corps was formed under colonial rule; the first battalion of regular soldiers, the First Singapore Infantry Regiment, was organized in 1957; the modern SAF was established in 1965 (2025)