Early in the 19th century, Mazi Okoli Idozuka was an immigrant from Isi-Akpu Nise to Arondizuogu. As a great slave warrior, he expanded Arondizuogu's boundaries. He later changed his name to Okoro Idozuka, an Aro equivalent of his former name. He was a wealthy ruthless and almost conscienceless slave trader like Izuogu Mgbokpo but was also a great leader. Nwankwo Okoro was the first son of Okoro Idozuka. At the age of 21 he joined his father in the slave trade. *[https://web.archive.org/web/20060429055818/http://frasouzu.com/Seminar%20Papers/Ambience.htm] By collecting slaves and war-captives he was able to build a very large family. When the British came, they made him a Warrant Chief because they believed he could subdue anybody and collect the taxes they desperately needed form them. Until this day, Arondizuogu is the biggest former Aro colony and a land of immigrants settling mainly on the rich land.