Second Republic / Military II (1979–1999)

1981 Onitsha Market fire — major commercial loss; arson rumours never proven.
1989 SAP riots — Onitsha, Nnewi and Awka student protests; security-force fatalities reported but not officially counted.Economic Shock Cycle
1995 & 1999 Aguleri-Umuleri wars — long-running land dispute over Otuocha boundary; estimated several hundred dead across both episodes. The 2016 onset of Aguleri-Otuocha oil production has overlaid a revenue dimension on the same dispute.

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.