According to archaeologists, warfare was a common activity 5,000 years ago among the peoples of the area of the Middle East that in modern times became Iran, Iraq, Saudi Arabia, and the smaller gulf states. Intermittent hostilities, often based on rivalries between the Persians of the eastern coast of the gulf and the Arabs of the western coast, have occurred ever since. Sargon, Hammurabi, Nebuchadnezzar II, and Alexander the Great were among the best known kings who led warring armies in the 2,500 years before the birth of Christ. During the centuries of Greek and Roman domination, the gulf region was of limited interest to the major powers, but the area's importance as a strategic and trading center rose with the emergence of Islam in the seventh century A.D. The caliphate's military strength was concentrated at Hormuz. Strategically sited at the mouth of the gulf, its authority extended over ports and islands of the Arabian Sea and the Persian Gulf.

The strategic importance of the Persian Gulf became increasingly apparent as the oil industry developed in the twentieth century. Saudi Arabia, Iraq, and Iran all claimed some of the territory of the gulf states during the years between World War I and World War II, but Britain's firm resistance to these claims enabled the amirates to maintain their territorial integrity without resort to arms. Except for a small force of the British Indian Navy to ensure observance of the treaty conditions and maintain maritime peace in the gulf, Britain abstained from direct military involvement. As the wealth of the gulf's oil resources became clear, the size of the British military establishment expanded. By the end of the 1960s, Britain had about 9,000 men in Oman, Sharjah (an amirate of the UAE), and Bahrain, where British military headquarters was located. The Trucial Oman Scouts, a mobile force of mixed nationality that Britain supported and British officers commanded, became a symbol of public order in the UAE until Britain's withdrawal from the Persian Gulf in 1971.