Colonial — pacification, Aro Expedition staging and the Women's War (1900–1960) — Cross River State

Aro Expedition staging (Nov 1901 – Mar 1902) — Col. Montanaro's four-column WAFF advance on Arochukwu is staged from Calabar and Itu; Cross River villages on the Itu–Bende axis are burned. Pattern: colonial conquest.
Ekumuru / Munshi patrols (1906–1914) — punitive WAFF expeditions against Bekwarra, Yala and the Obudu hill peoples to enforce the Anglo-German boundary line.
1929 Aba Women's Revolt — Calabar Province extension — protests at Ikot Ekpene, Abak, Itu, Opobo, Utu Etim Ekpo (most areas later excised to Akwa Ibom) leave c. 55 women dead at the Opobo shootings (16 Dec 1929). Pattern: state violence on protest.Impunity Loop
Bakassi colonial-era boundary disputes (1913–1959) — the Anglo-German treaties of 1885 and 1913 leave Bakassi formally inside Cameroon while the Kings of Old Calabar maintain it as Efik territory; the 11 Feb 1961 UN Plebiscite does not vote on Bakassi specifically.
Calabar earthquake / Cameroun mandate transfers — the southern Cameroons vote of 1961 strips the trans-Cross River Mamfe and Bamenda districts from Nigerian administration.