Militia - Wikipedia
A militia (/ m ɪ ˈ l ɪ ʃ ə /) is generally an army or some other fighting organization of non-professional soldiers, citizens of a country, or subjects of a state, who may perform military service during a time of need, as opposed to a professional force of regular, full-time military personnel or (historically) to members of a warrior nobility class (e.g. knights or samurai).