Complex sentence: Baycu Noyan was a Mongol commander in Persia, or present-day Iran (fl.1230-1260, also known as Bayju Noyon or Baichu) appointed by Ögedei Khan to succeed Chormagan, and expand Mongol power further in that area.
Split into simpler sentences: Baycu Noyan was a Mongol commander in Persia, or present-day Iran (fl.1230-1260, also known as Bayju Noyon or Baichu). He was appointed by Ögedei Khan to succeed Chormagan, and expand Mongol power further in that area.