Omar Ali Saifuddin II, Sultan (Sultanate of Brunei) : All Data

Omar Ali Saifuddin II was the Sultan of the Sultanate of Brunei from 1841 to 1852. During his reign, the Sultanate faced several conflicts, including the Brunei Civil War (1846-1847) and the Sarawak expedition (1846). The Brunei Civil War, which occurred within the calculated timespan of his rule, was a power struggle between two factions of the royal family, resulting in the division of Brunei into two separate territories. The Sarawak expedition, also within his reign, was a military campaign led by James Brooke, the first White Rajah of Sarawak, against the Sultanate to establish the Kingdom of Sarawak.