 However, the Middle Assyrian Empire (1365–1050 BC) once more began to grow in power also, with the ascension of Ashur-uballit I in 1365 BC.Ashur-uballit I attacked and defeated Mattiwaza the Mitanni king despite attempts by the Hittite king Šuppiluliuma I, now fearful of growing Assyrian power, attempting to preserve his throne with military support.The lands of the Mitanni and Hurrians were duly appropriated by Assyria, enabling it to encroach on Hittite territory in eastern Asia Minor, and Adad-nirari I annexed Carchemish and north east Syria from the control of the Hittites.