The Middle Assyrian Empire (1365–1020 BC) saw Assyria rise to be the most powerful nation in the known world. Beginning with the campaigns of Ashur-uballit I, Assyria destroyed the rival Hurrian-Mitanni Empire, annexed huge swathes of the Hittite Empire for itself, annexed northern Babylonia from the Kassites, forced the Egyptian Empire from the region, and defeated the Elamites, Phrygians, Canaanites, Phoenicians, Cilicians, Gutians, Dilmunites and Arameans. At its height, the Middle Assyrian Empire stretched from The Caucasus to Dilmun (modern Bahrain), and from the Mediterranean coasts of Phoenicia to the Zagros Mountains of Iran. In 1235 BC, Tukulti-Ninurta I of Assyria took the throne of Babylon, thus becoming the first "native Mesopotamian" to rule the state.