Wiktionary
n. (context now historical English) A guerrilla soldier fighting for independence in Algeria or Tunisia under French rule.
Wikipedia
The Fellagha, an Arabic word literally meaning "bandit", but also comes from "fellah" or farmer, and "fallaq" or blow up, refers to groups of armed militants affiliated with anti-colonial movements in French North Africa. It most often is used to refer to armed Algerian nationalists who adopted violent means in order to push the French out of Algeria as well as those same fighters in Tunisia or those who did the same. They were particularly important during the Algerian War (1954–1962) led by the National Liberation Front.
Usage examples of "fellagha".
However many fellagha he and his men shot, however many villages were razed to the ground, however many FLN terrorists died under torture, the rebellion spread until it enveloped the land and consumed the cities.
Although he sympathised with the revolt of the settlers led by Big Jo Ortiz in 1960, he still felt the lack of progress in smashing the fellagha once and for all was simply a tactical move by De Gaulle.
The letter had been written some weeks before Jean-Claude died, and he had kept it in his inside pocket during the patrol in the djebel looking for a band of fellagha who had wiped out a settler family.