The Thirtieth of September Movement was a self-proclaimed organization of Indonesian National Armed Forces members. In the early hours of 1 October 1965, they assassinated six Indonesian Army generals in an abortive coup d'état. Later that morning, the organisation declared that it was in control of media and communication outlets and had taken President Sukarno under its protection. By the end of the day, the coup attempt had failed in Jakarta. Meanwhile, in central Java there was an attempt to take control over an army division and several cities. By the time this rebellion was put down, two more senior officers were dead.

The New Order describes the regime of the second Indonesian President Suharto from his rise to power in 1966 until his resignation in 1998. Suharto coined the term upon his accession and used it to contrast his presidency with that of his predecessor Sukarno.