I have long suspected that the Ethiopian Derg regime, once the Marxists had eliminated their opposition on the "Council", reissued the nations' more popular medals, probably around 1980 or so. While my struggles with the Amharic dictionary are still epic, I have recently had a bit of a breakthrough with this medal.
My imprecise translation is that the medal commemorates "Struggle against Fascist Aggression" with the dates, 1928-1933. Given the Ethiopians follow the old style Julian calender, this translates to 1935-1940, or the years of the Italian-Ethiopian war.
Thus, I believe I can now (tentatively) identify this mysterious medal as a reissue, almost certainly made in the GDR (or Czechoslovakia), of the earlier Patriotic War Medal, which had featured the bust of the Emperor, Hale Selassie.
There seems to have been also a reissue of the refugees' medal, which also had incorporated the Emperor's likeness and the Victory Star, as a medal.
Note also that there are two "types" of this medal, with a slightly different inscription on the planchet. Also, what I presume to be a later version seems to be lighter in weight and made of a cupro-alloy, not (faux?) bronze (as here).