The Unification of the Kingdom of Saudi Arabia marked the re-establishment of the Saudi State. This unification began after the recapturing of Riyadh and the founding of the Kingdom by Founding King Abdulaziz Bin Abdulrahman Al Saud . He dedicated thirty-two years to unifying the country, starting his mission to recapture the core of the Saudi State just months after recapturingRiyadh. Exiting Riyadh During the founding stages of the Second Saudi State , it faced many external campaigns, such as the Ottoman occupation of al-Ahsa, and internal disturbances, such as Hail 's separation from Saudi rule. At that time, the Emir of Hail, Mohammed Bin Abdullah Bin Rashid, a Saudi State ally, harbored aspirations to annex Riyadh, especially after besieging it for forty days. Imam Abdulrahman , dispatched his son Abdulaziz Bin Abdulrahman and a delegation of prominent figures from Riyadh to ...