Question: What state existed from 1861, when King Victor Emmanuel II of Sardinia was proclaimed King of Italy, was the subject to the plotting of  an insurrection in Italian Eritrea by the government of Ethiopia?
Sentence (from "Battle of Halai"): On December 15, 1894, Bahta Hagos, the "chief of Okule-Kasai province in northern Tigré," launched a rebellion against the Italian authorities.
Relevant evidence: No