 Complete the following phrase:  The country today known as Iraq was a region of the Ottoman Empire until the partition of the Ottoman Empire in the 20th century. It was made up of three provinces, called vilayets in the Ottoman Turkish language: Mosul Vilayet, Baghdad Vilayet, and Basra Vilayet. In April 1920 the British Mandate of Mesopotamia was created under the authority of the League of Nations. A British-backed monarchy joining these vilayets into one Kingdom was established in 1921 under Faisal I of Iraq. The Hashemite Kingdom of Iraq gained independence from the UK in 1932. In 1958, 