Chaghaniyan (Middle Persian: Chagīnīgān; Persian: چغانیان Chaghāniyān), known as al-Saghaniyan in Arabic sources, was a medieval region and principality located on the right bank of the Oxus River, to the south of Samarkand.
During its early history, the region often shifted between Sasanian and Hephthalite control. By the early 7th-century, Chaghaniyan became independent from Hephthalite rule, and came under the control of local Iranian rulers known as the “Chaghan Khudah”. During the Muslim conquest of Persia, the Chaghan Khudah aided the Sasanians against the Rashidun Arabs. However, the Arabs, after having dealt with the Sasanian Empire, began focusing on the local rulers of Khorasan, which included the Chaghan Khudah and many other local rulers. In 652, the Chaghan Khudah, along with the rulers of Talaqan, Guzgan, and Faryab, aided the ruler of southern Tokharistan against the Arabs. Nevertheless the Arabs managed to emerge victorious. However, the Rashidun Caliphate soon fell into civil war, and was conquered by another Arab family, who founded the Umayyad Caliphate. During the early 660s, the Chaghan Khudah, named Turantash, sent an envoy under his chancellor Pukarzate to Varkhuman, the Sogdian king of Samarkand.
In 705, the Arab general Qutayba ibn Muslim managed to make the Chaghan Khudah, whose name is mentioned as Tish, acknowledge Umayyad authority. The real reason for Tish's submission, however, was to gain aid in defeating the local rulers of Akharun and Shuman in northern Tokharistan, who had been making incursions against him. Qutayba shortly defeated the two rulers, and forced them to acknowledge Umayyad authority.