In Sri Lanka, the military of Sri Lanka is responsible for external defense and may be called upon to handle specifically delineated domestic security responsibilities that generally do not include arrest authority; it has sent small numbers of personnel on UN peacekeeping missions; from 1983 to 2009, the military fought against the Liberation Tigers of Tamil Eelam (LTTE), a conflict that involved both guerrilla and conventional warfare, as well as acts of terrorism and human rights abuses, and cost the military nearly 30,000 killed; since the end of the war, a large portion of the Army reportedly remains deployed in the majority Tamil-populated northern and eastern provinces; the military over the past decade also has increased its role in a range of commercial sectors including agriculture, hotels, leisure, and restaurants 

Sri Lanka traditionally has had close security ties to India; India participated in the LTTE war in 1987-1991, losing over 1,000 soldiers; the Sri Lankan and Indian militaries continue to conduct exercises together, and India trains over 1,000 Sri Lankan soldiers per year; in recent years, Sri Lanka has increased military ties with China, including acquiring military equipment, hosting naval port calls, and sending personnel to China for training (2024)