During World War I, Sharif Hussein bin Ali declared a revolt against the Ottoman Empire, seeking independence from the Ottoman Turks and the creation of a single unified Arab state spanning from Aleppo in Syria to Aden in Yemen.
King Hussein declared the Kingdom of Hejaz. Later, Hussein was involved in war with Ibn Saud, who was the Sultan of Nejd. Hussein abdicated following the fall of Mecca, in December 1924, and his son Ali bin Hussein became the new king.
A few months later, Ibn Saud, whose clan originated in the central Nejd province, conquered Medina and Jeddah via an agreement with Jeddans following the Second Battle of Jeddah. He deposed Ali bin Hussein, who fled to Baghdad, eventually settling in Amman, Jordan, where his descendants became part of its Hashemite royalty.
As a result, Jeddah came under the sway of the Al-Saud dynasty in December 1925. In 1926, Ibn Saud added the title King of Hejaz to his position of Sultan of Nejd. Today, Jeddah has lost its historical role in peninsular politics after Jeddah fell within the new province of Makkah, whose provincial capital is the city of Mecca.
Pictures Source: The French Archive.