Statistics

Atlantic slave-trade embarkations from the Cross River (1670–1841): c. 1.2 million people (Voyages Database).
Calabar campaign casualties (Oct 1967): c. 2,000 combined (federal + Biafran + civilian).
Bakassi handover displacement (2008): c. 300,000 Efik/Bakassian residents resettled to Akpabuyo and Calabar South.
Anglophone Cameroon refugees in Cross River (2024 UNHCR): ~85,000 in Adagom and host communities.
Derivation revenue lost after 2012 ruling: estimated N48 bn / year at 2012 oil prices.

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.