The Sultanate of Muscat and Oman (), also known briefly as the State of Muscat and Oman () during the rule of Taimur bin Feisal, was a sovereign state that encompassed the present-day Sultanate of Oman and parts of present-day United Arab Emirates and Pakistan, in the second half of the 19th century and 20th century. Ruled by the Busaid dynasty, it was established as a result of the partition of the Omani Empire upon the death of its last ruler Said bin Sultan. The Sultanate transitioned into a new form of government after the palace coup of 23 July 1970 in which the sultan Said bin Taimur was immediately deposed in favor of his son Qaboos bin Said. Name Strictly speaking, Oman (Imamate of Oman, , ʿUmān al-Wusṭā) is the inner, continental part of the region without access to the coast and with the capital in the city of Nizwa. Muscat is a coastal sultanate, the rulers of which, in fact, carried out expansion, including overseas. Historical Muscat and Oman are separated by the Green Mountain plateau (Al Jabal Al Akhdar ()). The third part of historical Oman (eastern Arabia) was the so-called "Pirate Coast", later known as Treaty Oman, and now the United Arab Emirates (UAE). The fourth part of historical and present-day Oman is the Dhofar Governorate. Background The expelling of the Portuguese colonizers happened during the Yaruba Imams era in the 17th century. The Yaruba Imams later succeeded in driving out the Portuguese colonizers from east Africa and established a maritime empire that extended its powers to the Persian Gulf and Zanzibar. The Yaruba dynasty later lost power to the Persian colonizers. In 1749, the Persian colonizers were defeated by the elected Imam Ahmad bin Said. The British empire was keen to dominate southeast Arabia to curb the influence of other European powers and to weaken the Omani Empire in the 18th century. The British empire thus backed the Albusaidi Sultans of Muscat that came to power in the second half of the 18th century. The British empire established a series of treaties with the Sultans with the objective of increasing British political and economic influence over Muscat. The Sultanate eventually became increasingly dependent on British loans and political advice. Historical differences always existed between the more secular, rich, seafaring coastal Sultanate of Muscat and the tribes of the interior. Though the inland territories were under