 This coincided with the rising strength of the anarchist Qarmatian movement in eastern Arabia and southern Iraq.The Tayy associated themselves with the Qarmatians to establish their dominance of southern Syria; with likely Qarmatian encouragement, the Tayy launched a revolt between Syria and the Hejaz in 898, during which they plundered caravans and disrupted lines of communication.When the Qarmatians attacked Ikhshidid-controlled Palestine in 968, the leading Tayyid clan of Jarrah came with them and firmly established themselves in the country.