The Arabic peninsular region is located in the extreme southwestern corner of Asia and is bordered by the Red Sea, the Gulf of Aden, the Arabian Sea, and the Persian Gulf. The total area of the peninsula is about 1,000,000 square miles. The peninsula is divided into political divisions consisting of Saudi Arabia, Yemen, Oman, the United Arab Emirates, Kuwait, Qatar, and Bahrain. The majority of Arabians are ethnic Arabs and nearly all speak Arabic (with significant differences in dialect). Most Arabians have been Muslim since the Islamic expansion during the mid-7th century.