Complex sentence: Professor Taddesse Tamrat believes its borders included Fatagar, Dawaro and Bale; this gave Ifat control of the trade route inland from Zeila, making it a major commercial power.
Split into simpler sentences: Professor Taddesse Tamrat believes Ifat's borders included Fatagar, Dawaro and Bale. This gave the polty control of the trade route inland from Zeila, making it a major commercial power.