kobo was part of kingdom of axum where its capital city was axum). however, at the mid of haile selassie's rule of ethiopia (sometime around 1943), raya azebo, raya kobo were taken away from the raya province and they were given to welo province. one of the reasons why raya kobo and raya azebo were given to welo was because haile selassie's son crown prince amha selassie was appointed as the governor of welo. on 1995, raya rayuma was split into two parts once ethnic federalism was established in ethiopia. one of the two parts, which now turned out to have amhara majority (kobo) went to the new amhara region, the other (raya azebo) which still had a majority of tigrayans was occupied to tigray region , before haile selassie changed it on 1941/1943).