Ethiopia’s “independence” was won in Tigray
Technically, Ethiopia was never successfully colonized by an European country. This bit of history was because a serious of factors, including some that were out of Ethiopian hands, played into Ethiopia’s favor.
However, winning the decisive Battle of Adwa in 1896 during the First Italo-Ethiopian war was one of the Ethiopia did to ensure that it remained uncolonized. The intensity of the battle, as a result of the strength of the Italians, meant that if Ethiopian had not won in Adwa, we h=would have been speaking of a different kind of history.
Adwa is in Tigray.