The oba didn't plan it...
Ogiugo gave the head of obi oboro to chief imaran to present it to evbavba on his behalf, as he has promised his osun to make offerings to it first immediately he won the war, when he got home his beloved wife emokpo whom he inherited from his father told him how stupid that decision was, before he got to Benin, imsran had already claimed victory and the oba had giving him the entitlement of the war...
When ogiugo came the case was opened but the chiefs were more with imaran cause he's an aristocrat in the city not ogiugo whose a warlord in the country side...
Ugiugo felt betrayed but the chiefs weren't the oba he lost all hope and went back to Ugo, while in Ugo the issue was still in scrutiny and imaran committed suicide for his actions, and he was exonerated.
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Chief Ologbose'e was sent to tell him the news, as a Benin Chief he's not allowed to say "imaran committed suicide" there is a code word for it, so Ologbose'e relayed the message to him through the code, but agbogidi didn't understand him, and didn't clarify... after Ologbose'e left, he became rebellious, Oba Akengbuda never wanted to descend on him but it was getting too much.
Chief Ologbose'e against his own will was sent to bring his head to Benin city, it was in the fierce battle Emokpolo saw Ologbose'e and was demanding why the injustice, Ologbose'e told him ogiugo was exonerated and they don't know why he continued being rebellious...
Twas here Emokpolo explained her husband wasn't aware, and Ologbose'e now understand his message wasn't rightly recieve, began to look for ogiugo in the battle field but in the other end overwhelmed by the Benin armies, ogiugo had went to Igbaghon river were he's forbidden to even visit, the same river that caused his deformity that made Emokpolo take him to oboro to treat, he drowned himself in igbaghon and died.
Emokpolo was eventually taken to Benin city were she taught edo women the Eghughu-Agba dance..