The United Arab Emirates (the UAE or the Emirates) is a country in the eastern part of the Arabian Peninsula located on the southeastern coast of the Persian Gulf and the northwestern coast of the Gulf of Oman. The UAE consists of seven emirates and was founded on 2 December 1971 as a federation, after UK armed forces left the region. Six of the seven emirates (Abu Dhabi, Dubai, Sharjah, Ajman, Umm Al Quwain and Fujairah) declared their union on 2 December 1971. The seventh, Ras al Khaimah, joined the federation on 10 February 1972.[1] The seven sheikdoms were formerly known as the Trucial States, in reference to the truce treaties established with the British in the 19th century.[2]