The Indonesian National Armed Forces (Indonesian: Tentara Nasional Indonesia, literally "Indonesian National Military"; abbreviated as TNI) are the military forces of the Republic of Indonesia. It consists of the Army (TNI-AD), Navy (TNI-AL), and Air Force (TNI-AU). The President of Indonesia is the commander-in-chief of the Armed Forces. It comprises approximately 400,000 active military personnel.
Initially formed with the name of the People's Security Army (TKR), then later changed to the Republic of Indonesia Army (TRI) before changing again its name to the Indonesian National Armed Forces (TNI) to the present. The Indonesian Armed Forces 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 Armed forces including the Army, Navy, and Air Force has been organised along territorial lines, aimed at defeating internal enemies of the state and potential external invaders.
Under the 1945 Constitution, all citizens are legally entitled and obliged to defend the nation. 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 are recruited in their own home regions, receive basic military training prior to serving in all over regions in Indonesia.