See Safety and Security - Terrorism/Security and Safety and Security - Local Travel (North & East Ethiopia).
They were widely used in the Ancient Near East, Mesopotamia, Greece, Egypt, Eritrea, Ethiopia, and, most likely independently, in China and elsewhere in the Far East, and, more surely independently, by Mesoamerican civilisations, notably the Olmec and Maya.
The children's song that is sung on the night before Ashura day known as Ishaatoo, together with their gourd smashing march, remains one of the classic customs of early Islam of Eastern Ethiopia (It is not known elsewhere apart from East Ethiopia).
For example, In East Ethiopia, Siddiqis are usually called Qallu, which means people of the religion, as they were the first to bring Islam to this area.
And by the way, do u mind asking one more question to your prof. ahmed ismail when you meet him, tell that the people of Somaliland are wiling to join a unity of Somalia only after you successfully unite the other four somali ethnics (Djibouti, East Ethiopia, NFD and somali-italian).
In 1978, when the Dergue returned victorious from the Ethio-Somali War of 1977-1978, A national campaign was declared to rehabilitate the war torn districts of East Ethiopia.
Fugug is a long chain of mountains in East Ethiopia that runs from Arba Gugu (west) to Jijjiga in the east, and is called by geographers as Ahmar Mountains.