brigade vs militia

brigade

noun
  • Military unit composed of several regiments (or battalions) and including soldiers from different arms of service. 

  • A group of people who share views or a specific characteristic. 

  • A group of people organized for a common purpose. 

  • Coordinated online harassment, disruption or influencing, especially organized by an antagonistic website or community. 

verb
  • To harass an individual or community online in a coordinated manner. 

  • To form or unite into a brigade; to group together. 

militia

noun
  • An army of trained civilians, which may be an official reserve army, called upon in time of need, the entire able-bodied population of a state which may also be called upon, or a private force not under government control. 

  • Synonym of militsia: the national police force of certain countries (e.g. Belarus). 

How often have the words brigade and militia occurred in a corpus of books? (source: Google Ngram Viewer )