All 3 Uses

militant
in
Light in August
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There is nothing militant in it, nothing of outraged morality.†
Chpt 4 *

militant = using extreme or violent methods used to achieve a political goal; or someone who uses such methods
Perhaps, if he were thinking at all, he believed that he had been guided and were now being propelled by some militant Michael Himself as he entered the room.†
Chpt 9
Yet it still seemed to be filled with the presence of the blonde woman, its very cramped harsh walls bulged outward with that militant and diamondsurfaced respectability.†
Chpt 10

Definitions:

(1) (militant)
using extreme or violent methods to achieve a political goal; or someone who uses such methods
(2) (meaning too rare to warrant focus)