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With the breakup of the Golden Horde the regional powers were the Nogais south of the Urals, the Shaybanids southeast of the Urals and the Taibugas in the forested lands to the east. The last two alternated control over the Khanate of Sibir. From about 1428, the Shaybanid Abu'l-Khayr Khan killed the Siberian Khan, Kazhy Muhammad and established a brief empire that stretched from Sibir to the Syr Darya. As people and power drifted southeast, the remaining Shaybanids coalesced around Ibak (Allworth,p47). In 1464 (many sources), or after Abu’l Khayr’s death in 1468 (Forsyth.p25) or about 1480 (Grosset) Ibak, with the help of the Nogais, killed Mar, the Taibugid Khan, and became the Khan of Sibir.
At some date, the Nogai brothers Musa and Yamgurchi were at war and Yamgurchi invited Ibak from Tyumen. He appeared along the Volga claiming to have a better right to rule the Great Horde than Ahmed Khan (Howarth,p980). At the time of the Ugra standoff Ibak may have has some arrangement with Moscow to threaten Ahmed in the rear. In 1491 Ibak and Yamgurchi (and Musa?) killed Ahmed Khan. (Khodarkovsky in a footnote implies that there is some doubt about the details). In 1495(most common), or 1494, or 1493 (Grosset, p 489) Ibak was killed by Mamut, a grandson of Mar (Howarth,p981), who then became Khan of Sibir.
| Khan of Sibir
- Allworth, Edward, ‘The modern Uzbeks’,1990 (on books.google.com)
- Forsyth, James, ‘A History of the Peoples of Siberia’,1994 (on books.google.com)
- Grosset, Rene, ‘The Empire of the Stepps’, 1970
- Howarth, Henry Hoyle, ‘History of the Mongols’, 1880 (on books.google.com)
- Khodarkovsky, Michael, ‘Russia’s Steppe Frontier’, 2002
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