Colonial — Akoko-Edo patrols and the Egbe Edo movement (1914–1960)

1914 cocoa-and-rubber tax protests in Iyanomo and Sapele rubber estates.
1929 Aba Women's War — Benin Province echo — Sapele and Warri-axis women's protests; the upper Benin province sees limited extension.Impunity Loop
1937 Iyase John Eweka constitutional dispute — first modern litigation over the powers of the Oba's traditional cabinet.
1942–45 — wartime palm-oil and rubber requisitioning protests at Sapele, Iyanomo, Igueben.
1948 — Egbe Edo / Edo Cultural Group founded; the seed of mid-century Edo political identity.

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.