Complex sentence: He is the only Zomi prince whom the neighbouring Meitei (Manipur) Kingdom ever acknowledged as Raja (or Ningthou in Metei language) and who ruled more than 70 cities, towns, and villages.
Split into simpler sentences: He is the only Zomi prince whom the neighbouring Meitei (Manipur) Kingdom ever acknowledged as Raja (or Ningthou in Metei language). His powerful dominion spread over more than 70 cities, towns, and villages.