Complex sentence: The old town of Bhavnagar was a fortified town with gates leading to other important regional towns and remained a major port for almost two centuries, trading commodities with Africa, Mozambique, Zanzibar, Singapore and the Persian Gulf.
Split into simpler sentences: The old town of Bhavnagar was a fortified town with gates leading to other important regional towns. It remained a major port for almost two centuries, trading commodities with Africa, Mozambique, Zanzibar, Singapore and the Persian Gulf.