Complex sentence: Tibet was incorporated into the Mongol Empire, retaining nominal power over religious and regional political affairs, while the Mongols managed a structural and administrative rule over the region, reinforced by the rare military intervention.
Split into simpler sentences: Tibet was incorporated into the Mongol Empire, retaining nominal power over religious and regional political affairs, while the Mongols managed a structural and administrative Wylie. ' rule over the region, reinforced by the rare military intervention.