Jagoldai (Tatar: Җагалдай, Cağolday, Cağalday; ; , ''Yagoldayeva t'ma''; pronunciation: or ) was a small Tatar tumen (territorial and military-administrative unit) in what is now Kursk Oblast and Belgorod Oblast of Russia, as well as parts of Sloboda Ukraine. It existed as a vassal state of the Grand Duchy of Lithuania during the 15th and early 16th centuries.
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Jagoldai (Tatar: Җагалдай, Cağolday, Cağalday; ; , ''Yagoldayeva t'ma; pronunciation: or ) was a small Tatar tumen (territorial and military-administrative unit) in what is now Kursk Oblast and Belgorod Oblast of Russia, as well as parts of Sloboda Ukraine. It existed as a vassal state of the Grand Duchy of Lithuania during the 15th and early 16th centuries.
The principality was founded between 1428 and 1438 by Tatars who had defected from the Golden Horde during a period of internal strife and plague. The Russian designation t'ma (тьма, literally "darkness") derives from the tumen, a Mongol-Tatar administrative unit theoretically representing 10,000 households or soldiers.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).