Era II — Babangida → Abacha (1991–1999)

12 Dec 1991 — Seat of government moved to Abuja; Lagos protests against the relocation pass without incident.
1996 — Federal Capital Development Authority (FCDA) demolitions at Garki Village I and II; civil-society protests led by the Save Abuja Indigenes Movement.

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.