from 1928 until 1930 there was a large revolt over taxes and central government control in the raya area. the military and areal bombardment was used to regain central control. this marked the first use of air power in ethiopia. some of the local rebels were involved with attacking ethiopian forces when the italians invaded in 1936. in january 1942 a clash at kobo between locals and soldiers collecting taxes led to three british officers and nine ethiopian soldiers killed. the ethiopian government responded with an aerial bombardment of the town. this skirmish was one of the events which lead up to the woyane rebellion. there was another raya revolt in 1947–48. repression of this revolt also involved areal bombardment.