Activism, in a general sense, can be described as involvement in action to bring about change, be it social, political, environmental, or other change. This action is in support of or opposition to one side of a controversial argument.
There are many different forms of activism; a select list follows.
... German garrison. Victory did not come easily. In July 14 in Vercors[?] a newly reinforced maquis group fought 200.000 Waffen SS soldiers under general Karl Fraum[?] and ...