Alauddin Ibrahim Mansur Syah

Sultan Alauddin Ibrahim Mansur Syah, also known as Ali Alauddin Mansur Syah (died 1870) was the thirty-third sultan of Aceh in northern Sumatra. He was the eight ruler of the Bugis Dynasty and ruled de facto from 1838, formally from 1857 to 1870.

Originally called Tuanku Ibrahim, he was the son of Sultan Alauddin Jauhar ul-Alam Syah (1795-1823) and the full brother of Sultan Alauddin Muhammad Da'ud Syah I (1823-1838). When his brother gained the throne, Tuanku Ibrahim was made Raja Muda (junior raja) and was one of the main assistants to the relatively weak sultan. The latter was succeeded by a minor son, Alauddin Sulaiman Ali Iskandar Syah, in 1838. However, Tuanku Ibrahim immediately took power as the acting sultan; as such he was called Alauddin Ibrahim Mansur Syah. He tried to tighten the family ties to his nephew by giving him his daughter Sribanun to marry. At length that did not help.

Alauddin Ibrahim Mansur Syah is considered the most enterprising and forceful sultan to have ruled Aceh since the great days of the seventeenth century. The regional headmen (panglimas) and chiefs (uleëbalangs) had acted independently since long. A number of small "pepper rajas" ruled enclaves along the coast, boosted by the flourishing international pepper trade. The new acting sultan strove to bring a degree och cohesion and obedience among the components of the sultanate. This cohesion was briefly threatened in the 1850s. The nominal sultan, his nephew Alauddin Sulaiman Ali Iskandar Syah, came to age by 1854 and demanded the prerogatives due to him. Alauddin Ibrahim Mansur Syah was unwilling to cede his powers and a bitter civil strife followed. The various panglimas and uleëbalangs chose sides in the conflict. However, Alauddin Ibrahim Mansur Syah was able to maintain the capital Kutaraja. When his nephew died in 1857, he was left the sole ruler and was secure on the throne until his demise in 1870. The economy expanded in his time. New pepper plantations were opened in the north-east, between Lhokseumawe and Tamiang, by 1850. Lots of labour migrants arrived from other parts of Aceh and several uleëbalangs benefited from the new commercial opportunities. The sultan provided lands and trading rights to uleëbalangs who supported him.

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