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Alexander the Great took conquered it and took it over as his own empire.
33 million square km (12 million square miles).
Mongolian
Chinggis Khan
Identical to the Persian Empire when he took it over.
The Assyrian empire took over Mesopotamia and raided their empire. They learned how to use iron and they took over many city states.
After the Mogul Empire fell Great Britan took over most of India.
It took it over and incorporated it.
the Roman Empire
Alexander the Great took over the Empire.
Hernando Cortes took over the Aztec empire.
the spanish