On this day May 20, 1927
By the Treaty of Jeddah, the United Kingdom recognized the sovereignty of King Ibn Saud over Hejaz and Nejd, which later merged to become Saudi Arabia.
Following the defeat of Hussein, the British government signed the treaty which abolished the Darin protection agreement and recognized the independence of the Hejaz and Najd, covering much of what is today Saudi Arabia, with the Al Saud as its rulers.
At this point, Ibn Saud changed his title from Sultan of Nejd to King of Nejd. Initially the two parts of his dominion (Nejd in the east and Hejaz in the west) were administered separately.
From 1927 to 1932 Ibn Saud continued to consolidate power throughout the Arabian Peninsula. In March 1929 he defeated elements of the Ikhwan, which had disobeyed his orders to cease raiding and had invaded Iraq against his wishes, at the Battle of Sbilla. In 1932, having conquered most of the Peninsula, Ibn Saud renamed his dominions “Saudi Arabia” and proclaimed himself “King of Saudi Arabia”.