The following year, 1847, Brooke asked the Sultan of Brunei to sign another treaty to prevent the Sultanate from engaging in any concession treaty with other foreign powers especially after the visit of in 1845. American policy at the time however made no intention to establish any solid presence in Asia and the Pacific. By 1850, the United States recognised the status of Brooke's raj as an independent state. Sultan Omar Ali Saifuddin II died in 1852 and he was succeeded by Mumin, which already proved a success in Brooke's efforts to establish a pro-British government in Brunei. The new Sultan then ceded Saribas and Skrang districts, which later became the Second Division, to Brooke in 1853 due to conflict with pirates.