Complex sentence: King Wasashatta rebelled against the Assyrians and sought the help of the Hittites to no results, Adad-nirari I attacked mittani and conquered most its cities, the royal family of Mittani escaped to Irridu but the Assyrians arrived, found them and deported them to Assyria.
Split into simpler sentences: King Wasashatta rebelled against the Assyrians and sought the help of the Hittites, but saw no results. The royal family of Mittani escaped to Irridu but the Assyrians found them and deported them to Assyria.