Complex sentence: Ahmad Pasha intermittently served as "amir al-hajj", but struggled to gain further promotion by the Ottoman government, having to lobby several Istanbul-based viziers and bureaucrats with large sums of money and other gifts, unlike his predecessors.
Split into simpler sentences: Ahmad Pasha intermittently served as "amir al-hajj". He struggled to gain promotion by the Ottoman government, having to lobby several Istanbul-based viziers and bureaucrats with large sums of money and other gifts, unlike his predecessors.