- 27 Aug 1991 — Jigawa State created. Peaceful but contested boundary disputes with Kano (Ringim, Taura) and with Yobe (Hadejia–Nguru wetlands) settled by 1996.
- 1991–1996 — Disputes over the location of the state capital (Dutse vs Hadejia) and over the Emir of Dutse's elevation to first-class status (4 March 1996); no fatalities.
Jigawa State · Crisis deep dive
Era II — Buhari I · Babangida · Abacha · Transition (1983–1999)
Methodology
Tier 1 · primary
Courts. Gazettes. National archives.
Tier 2 · corroborating
OCCRP. HRW. BudgIT. TheCable.
Tier 4 · tertiary, flagged
Wikipedia only where primary is pending. Always labelled.