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Group: United Principalities of Moldavia and Wallachia (Romania)

Atsïz had become Shah of Khwarazm following …

Years: 1142 - 1142

Atsïz had become Shah of Khwarazm following his father's death in 1127.

During the early part of his reign he had focused on securing Khwarazm against nomad attacks.

He rebelled in 1138 against his suzerain, the Seljuk sultan Ahmed Sanjar, but was defeated in Hezarasp and forced to flee.

Sanjar installed his nephew Suleiman Shah as ruler of Khwarazm and returned to Merv.

Atsïz returned, however, and Suleiman Shah had been unable to hold onto the province.

Atsïz then attacked Bukhara, but by 1141 he had again submitted to Sanjar, who pardoned him and formally returned control of Khwarazm over to him.

The same year that Sanjar pardoned Atsïz, the Kara Khitai under Yelü Dashi had defeated the Seljuks at Qatwan, near Samarkand.

Atsïz takes advantage of the defeat to invade Khurasan, occupying Merv and Nishapur.

Yelü Dashi, however, sends a force under Erbuz to plunder Khwarazm, forcing Atsïz to pay an annual tribute of thirty thousand dinars.

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