State Formation Chronology (Hausa Presence in the Waters of the Niger)
A structured historical-chronological, dynastic, and territorial-policy dataset cataloging 21 landmark historical milestones, dynastic transitions, external invasions, and colonial border re-allocations that map the evolution of the Yauri Kingdom from its early medieval roots through its formal configuration as a colonial Emirate under the British crown.
Source & Methodology
Extracted from primary Arabic-language royal letters, local Hausa dynastic king lists (Tarikh Sarakunan Yauri), early British colonial provincial gazetteers, and early administrative survey maps (incorporating Ryan's $1919$ historical audits) systemized by editors Prof. A.I. Yandaki, Prof. H.M. Maishanu, and Prof. M.U. Bunza in their definitive volume "Hausa Presence in the Waters of the Niger: A History of Yauri Kingdom from 1411 up to its Emirate Status".