- 17th–18th c. — Igala–Benin wars (Inikpi sacrifice tradition); Igala–Jukun tributary wars.
- Late 19th c. — Nupe raids into Okun-Yoruba (Yagba, Bunu) for slaves.
- 1 January 1900 — Lugard proclaims Northern Protectorate at Lokoja.
- 1903–10 — Nupe revolt at Bida partially affects northern Kogi.
Kogi State · Crisis deep dive
Pre-colonial & colonial (pre-1960)
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.