Complex sentence: PETA (Indonesian "Pembela Tanah Air"-Defenders of the Homeland) was an Indonesian volunteer army established on 3 October 1943 in Indonesia by the occupying Japanese to assist Japanese forces oppose a possible invasion by the Allies.
Split into simpler sentences: PETA (Indonesian "Pembela Tanah Air"-Defenders of the Homeland) was an Indonesian volunteer army established on 3 October 1943 in Indonesia by the occupying Japanese. The Japanese intended PETA to assist their forces oppose a possible invasion by the Allies.