The Yemeni Zaidi State, also known as the Zaidi Imamate and the Qasimid State, was a Zaidi-ruled independent state in the Greater Yemen region, which was founded by al-Mansur al-Qasim in 1597 and absorbed much of the Ottoman Yemen Eyalet by 1628 and completely expelled the Ottomans from Yemen by 1638. The Zaidi state continued to exist into 18th and 19th century, but gradually fractured into separate small states. The most notable of those states was the Sultanate of Lahej; most of those states (except Lahej) were submitted by the Ottomans and incorporated into the restored Ottoman province of Yemen Eyalet in 1849.