Politically, Abadan was often the subject of dispute between the nearby states; in 1847, Persia acquired it from the Ottoman Empire, in which state Abadan has remained since. From the 17th century onward, the island of Abadan was part of the lands of the Arab Ka'ab (Bani Kaab) tribe. One section of this tribe, Mohaysen, had its headquarters at Mohammara (present-day Khorramshahr), until the removal of Shaikh Khaz'al Khan in 1924.