The People's Security Army (Indonesian: Tentara Keamanan Rakyat) or commonly abbreviated as TKR is the name of the first military force formed by the Indonesian Government, after the Proclamation of Indonesian Independence. TKR was formed on October 5, 1945, based on an announcement issued by the Government of the Republic of Indonesia. TKR was formed as a result of improving the function of the previously existing People's Security Agency (BKR) and its core army was taken from the former KNIL & PETA.
The formation of this army was aimed at overcoming a situation that was starting to become unsafe, due to the return of Allied troops to Indonesia after Japan surrendered unconditionally to the allies.