Persian Gulf

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Persian Gulf (Arabian Gulf) Arm of the Arabian Sea between Arabia and the Asian mainland, and connected to it by the Strait of Hormuz and the Gulf of Oman. European powers began to move into the region in the 17th century. Britain had achieved supremacy in the Gulf by the mid-19th century. The discovery of oil in the 1930s increased its importance and, especially after the British withdrawal in the 1960s, both the USA and the Soviet Union sought to increase their influence in the region. Tension was heightened by the Iran-Iraq War in the 1980s, and the Gulf War against Iraq in 1991. The Gulf remains a major shipping and oil supply route. Area: c.240,000sq km (93,000sq mi).

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