Sultanate of Nejd

The Sultanate of Nejd was the third iteration of the Third Saudi State, from 1921 to 1926. It was a monarchy led by the House of Saud, and a legal predecessor of modern-day Saudi Arabia. This version of the Third Saudi State was created when Abdulaziz ibn Saud, Emir of Riyadh, declared himself sultan over Nejd and its dependencies. On 2 December 1922, the Nejd signed an agreement with Kuwait defining their border with each other, which would be a straight line along the 29th parallel. On 19 December 1925, the Kingdom of Hejaz surrendered to the forces of Ibn Saud, who was thereafter proclaimed king of the Hejaz on 8 January 1926 and merged his dominions into the Kingdom of Hejaz and Nejd.