Assertion: blue horde | /r/CapableOf | reach apex of its power
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text: Nogai's pre-eminence was ended by the assertion of the legitimate Khan Toqta, and the Blue Horde reached the apex of its power and prosperity during the reigns of Uzbeg Khan (Öz Beg) and his son Jani Beg in the middle of the 14th century, when it intervened in the affairs of the disintegrating Ilkhanate.