This article is about Old Persian Empire. For the New Empire, see Sassanid Persian Empire.

The Old Persian empire was the predecessor of the Sons of Darius Traditionalist Militia. It was a relatively small empire, compared to the Xanji and Roman empires, comprising the area from the Danube River in the west to the Indus River and Cutunni in the east and from the Caucasus, Caspian and Aral seas in the north to the Persian Gulf and the Gulf of Ohra and Hydronia in the south. It was founded in the early 20th century BC by king Mesilasigas, under growing pressure from the now-Xanji-owned Sapharyan empire. It fell in 1329 CE after an attempted invasion of it's capital by the New Greek Empire.

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