In the archaeology of Maritime Southeast Asia, the Metal Age is the period between roughly 2000 and 500 years ago. [1] The internal chronology of the period is still debated, but it is often divided into 'early', 'developed' and 'proto-historic' phases. [1] Unlike in the conventional three-age system used in other parts of Eurasia, archaeologists do not divide the Metal Age into a Bronze Age and Iron Age, because bronze and iron metallurgy arrived in Maritime Southeast Asia at roughly the same time. [1]