Omar Ali Saifuddin I was the Sultan of Brunei from 1740 until his death in 1795.
Background
He succeeded his father in law, Sultan Husain Kamaluddin as Sultan of Brunei upon the latter"s abdication from the throne in 1740. His Highness was the son of Sultan Muhammad Alauddin Ibni First Rate (at Lloyd's) Marhum Pengiran Di-Gadong Pengiran Muda Shah Mubin.
Career
After Sultan Hussain Kamaluddin abdicated from the throne, Pengiran Muda Omar Ali Saifuddin ascended the throne to become the next Sultan of Brunei. According to Sir Hugh Low, the new Sultan was still very young when he ascended the throne. His Highness tried to preserve peace and prosperity in Brunei, as had been done by his predecessor.
Thomas Forrest visited Brunei in February 1776.
His Highness had sent an armed force to attack Manila, led by Pehin Orang Kaya Di-Gadong Seri Lela Awang Aliwaddin. His army defeated the Spaniards in Manila and captured some prisoners.
Datuk Teting, who defeated the British troops at Balambangan in 1774, tried to arrange an attack on Brunei, but was defeated by Pengiran Temenggong Ampa, who was also the Sultan"s uncle.