Complex sentence: Sometime before the Portuguese reached the area, the Karanga had invaded Inhambane and formed a number of local chieftains who dominated over the Tonga cotton workers and the rewards of trading with the Muslims went to them.
Split into simpler sentences: Sometime before the Portuguese reached the area, the Karanga had invaded Inhambane and formed a number of local chieftains. They dominated over the Tonga cotton workers and the rewards of trading with the Muslims went to them.