Nacionalne oružane snage Indonezije (Tentara Nasional Indonesia, TNI) broje oko 430.000 ljudi u što su uključeni kopnena vojska, mornarica (sa mornaričkom pješadijom) te avijacija. Oružane snage su formirane za vrijeme Revolucije, kada su pokrenule gerilski rat zajedno sa neformalnim naoružanim grupama. Kao rezultat takvih početaka, vojska je ostala organizirana po teritorijalnoj liniji, tako da ogromna većina njenih pripadnika služi u svojoj regiji. Zadaci vojske su očuvanje unutrašnje sigurnosti i borba protiv potencijalnih napadačkih snaga. Zakonom je određeno obavezno služeje vojnog roka, ali vojska i bez redovne regrutacije ima dovoljan broj vojnika. Broj vojno sposobnih u dobi od 16 do 49 godina je preko 52.000.000 miliona ljudi, sa prilivom od oko 2.000.000 novih svake godine.

      The Indonesian National Armed Forces (Tentara Nasional Indonesia, TNI; formerly Angkatan Bersenjata Republik Indonesia, ABRI) in 2009 comprises approximately 432,129 personnel including the Army (TNI-AD), Navy (TNI-AL) including the Indonesian Marine Corps (Korps Marinir) and the Air Force (TNI-AU). The Indonesian Army was formed during the Indonesian National Revolution, when it undertook a guerrilla war along with informal militia. As a result of this, and the need to maintain internal security, the Army has been organized along territorial lines, aimed at defeating internal enemies of the state and potential external invaders. Conscription is provided for by law, yet the Forces have been able to maintain mandated strength levels without resorting to a draft. Most enlisted personnel were recruited in their own home regions and generally trained and served most of their time in units nearby. The Indonesian armed forces are voluntary. The available manpower fit for military service of males aged between 16 to 49 is 52,000,000, with a further 2,000,000 new suitable for service annually.