By the Treaty of Jeddah, signed on 20 May 1927, the United Kingdom recognized the independence of Abdul-Aziz's realm (then known as the Kingdom of Hejaz and Najd). After the conquest of the Hejaz, the Ikhwan leaders wanted to continue the expansion of the Wahhabist realm into the British protectorates of Transjordan, Iraq and Kuwait. Abdul-Aziz, however, refused to agree to this, recognizing the danger of a direct conflict with the British. The Ikhwan therefore revolted but were defeated in the Battle of Sabilla in 1929, and the Ikhwan leadership were massacred.