Army of the Ethiopian Empire
The army of the Ethiopian Empire was the principal land warfare force of the Ethiopian Empire and had naval and air force branches in the 20th century. The organization existed in multiple forms throughout the history of the Ethiopian Empire from its foundation in 1270 by Emperor Yekuno Amlak, to the overthrow of the monarchy and Emperor Haile Selassie in 1974 by members of the Ethiopian army.
Source: Wikipedia — Army of the Ethiopian Empire (CC BY-SA 4.0)