A Turkic-Mongol steppe confederation of the Pontic-Caspian region, dominated by the Manghit clan and tracing its formation to the 14th-century kingmaker Nogai Khan and the 1390s Manghit leader Edigu; occupied the steppe between the Volga and Ural rivers, splitting into Greater and Lesser Nogai Hordes from 1557.
Broke down in the early-to-mid 17th century under pressure from the invading Kalmyks from the east and Russian expansion from the north/west, with Wikidata dating final dissolution to 1634.
The atlas holds 2 border frames for Nogai Horde — the shape you scrub through changes in 1440 · 1565.
Dedicated English-language academic monograph on the Nogai Horde's formation ('Manghït Yurt' is the horde's own name for itself, from its ruling Manghit clan); verified on Open Library (title + author match).