The Ottoman Empire entered World War I holding all of western Arabia and supported in central northern Arabia by the Rashīdīs of Ḥāʾil. Earlier Ottoman attempts to extend the empire to eastern Arabia, however, had been countered by the British, who were then paramount in the gulf and in treaty relation with the Arab sheikhdoms there. Sharif Ḥusayn ibn ʿAlī of Mecca, with assurance of British support, revolted against the Ottomans in June 1916, taking Mecca but failing to capture Medina. The British also supported the Idrīsī in Asir against the Ottomans. In Yemen Ottoman forces entered the Aden Protectorate, but the war subsequently settled down to a stalemate.
Arabia, c. 1900Map of Arabia, with insets of Jerusalem and Palestine (c. 1900); from the 10th edition of Encyclopædia Britannica, published in 1902.Encyclopædia Britannica, Inc.
Fayṣal I, king of Iraq (1921–33).BBC Hulton Picture Library
ʿAbdullah I, the first king of Jordan (1946–51).Encyclopædia Britannica, Inc.Two sons of Sharif Ḥusayn of Mecca, Fayṣal and Abdullah, stirred up the Hejazi tribes against the Ottomans and, assisted by British supplies and liaison officers, including the famous T.E. Lawrence (“Lawrence of Arabia”), moved northward to Transjordan along the right flank of the British armies and into Damascus (1918). Fayṣal set up an Arab government there, only to be dislodged by the French in 1920. In 1921 he was made king of Iraq, Abdullah emir of Transjordan.
Wahhābī-sharifian dispute
During the war, relations between Sharif Ḥusayn and Ibn Saʿūd worsened. In 1919 the dispute broke into an open clash. The Wahhābīs won so decisive a victory that they might have advanced unopposed into the Hejaz but for pressures on Ibn Saʿūd by the British. Instead, Ibn Saʿūd concentrated his forces against Ibn Rashīd, mastering all Shammar territory and capturing Ḥāʾil in 1921.
Meanwhile, the grand sharif refused the terms of a treaty with Britain, mainly because of the Balfour Declaration, which approved a national home in Palestine for the Jews. The Wahhābīs marched into the Hejaz in 1924, and by October Ḥusayn was ruler no longer. Saudi Arabia
Ibn Saʿūd’s zealous Wahhābī followers, arriving in the more cosmopolitan atmosphere of Hejaz society, were now exposed to the world of Islam at large. Ibn Saʿūd managed the resulting problems with firmness and tact. He had furthermore to enforce his rule over the tribes impatient with centralized government. His tough action with them won, and he set out to develop security, economic reform, and communications.
On Ibn Saʿūd’s southern border the Idrīsī sayyids of Asir had risen to power in the first decade of the 20th century. When in 1926 and 1930 Ibn Saʿūd concluded agreements with the Idrīsī, rendering Asir a virtual dependency of Saudi Arabia, Imam Yaḥyā of Yemen took Al-Ḥudaydah and southern Asir. Saudi troops swept into the Yemeni Tihāmah, but they withdrew after the Treaty of Al-Ṭāʾif in 1934, which acknowledged Saudi rule over Asir.
In the postwar years Britain and Saudi Arabia concluded agreements defining the frontiers with the British mandates of Jordan and Iraq (though most Saudi borders remained uncertain), and by treaty in 1927 Ibn Saʿūd was recognized as a sovereign, independent ruler. Yemen
Imam Yaḥyā had to virtually conquer Yemen, in the Zaydī interest, after the Ottoman departure; by stern measures he established security. He refused to recognize the British-backed border between the Aden protectorates and Yemen. The British in the later 1930s pacified and, to a limited degree, developed their protectorates. Postwar Arabia, to 1962
The post-World War I settlement and centralization of power in the hands of Yaḥyā, Ibn Saʿūd, and the British gave Arabia a large measure of internal peace and external security, which endured until 1962. A new factor in the 1930s was the discovery of immense quantities of petroleum in the deserts. In Bahrain oil was struck in June 1932. The American-owned Arabian Standard Oil Company (later Saudi Aramco) discovered oil in the Dhahran area of Saudi Arabia, and the first shipments left in September 1938. The Kuwait Oil Company, a joint Anglo-American enterprise, began production in June 1946. Thereafter oil was discovered in many other places, mostly in the Persian Gulf. Vast petroleum revenues brought enormous changes to Saudi Arabia and transformed the gulf states. The market for labour brought migrants from Yemen and other Arab countries.
Egypt, and later Syria and Iraq, utilized resentment of Israel and the appeal of Pan-Arab nationalism in the 1950s and ’60s to try to undermine “feudal” Arab kingdoms and to remove British and American influence from Arabia. Arabia since 1962
Political changes in Yemen and Saudi Arabia during the early 1960s epitomized a vast transformation of the Arabian Peninsula that affected the lives of most of its inhabitants. In 1962 Egyptian-trained Yemeni officers led a coup d’état and invited Egypt to send troops to support the republic. The imam’s forces, although backed by Saudi Arabia during five years of war against large Egyptian armies, ultimately lost, and the republic was triumphant. Following the death of King Ibn Saʿūd of Saudi Arabia in 1953, his ineffective heir, Saʿūd, was replaced in a royal family coup d’état in 1964 by another son, Fayṣal, who initiated a number of modernizing changes.
Oil rig in the Persian Gulf off Kuwait.© Piergiorgio Sclarandis/Black Star
The power of governments increased in all the countries of the peninsula as oil production provided most ruling elites with unprecedented wealth. Religion and dynasty, the two pillars of most earlier regimes, were increasingly supplemented by the distribution to the people of oil revenues; individual national identities also began slowly to develop. Governments whose effective jurisdiction had often been limited to the coast now expanded their powers into the interior, while commercial, social, cultural, and diplomatic interactions with the rest of the world played a larger role in determining local matters.
President Gamal Abdel Nasser of Egypt applied political pressure to remove the British from Aden, and Britain left Aden and South Yemen in 1967. A violently leftist group, the National Liberation Front (NLF), proclaimed the People’s Democratic Republic of Yemen (Yemen [Aden]), which became communist and formed links with the Soviet Union.
After a compromise between royalists and republicans, northern Yemen, with its capital at Sanaa, was ruled by relatively liberal military governments, with army officers as presidents, including the long-lasting ʿAlī ʿAbd Allāh Ṣāliḥ, who first took office in 1978. North Yemen gained considerable income from the hundreds of thousands of Yemenis who worked in oil-rich Saudi Arabia; in the 1980s both Yemens discovered oil fields of their own.
Over several years a struggle for control of Yemen (Aden) waged within the ruling political party resulted in a brief civil war in 1986. The collapse of communism in Europe and the yearning of Yemenis for the union of the two parts of Yemen in the north and south, despite the great differences between them, resulted in the proclamation of their unification on May 22, 1990.