Complex sentence: The Siliwangi Division or KODAM VI/Siliwangi (later re-numbered KODAM III/Siliwangi) is the name of a unit of the Indonesian Army formed during the Indonesian National Revolution by what was then known as the People's Security Army (TKR).
Split into simpler sentences: The Siliwangi Division or KODAM VI/Siliwangi (later re-numbered KODAM III/Siliwangi) is the name of a formation (military) of the Indonesian Army. The Division was formed during the Indonesian National Revolution by what was then known as the People's Security Army (TKR).