militant

Fighting or warring.

Having a combative character; aggressive, especially in the service of a cause.

A fighting, warring, or aggressive person or party.

Fighting; warring; engaged in warfare; pertaining to warfare or conflict.

Having a combative character or tendency; warlike.

Engaged in warfare; fighting; combating; serving as a soldier.

the Christian church on earth, which is supposed to be engaged in a constant warfare against its enemies, and is thus distinguished from the church triumphant, in heaven.

aggressive or combative

fighting or warlike; belligerent

Active in an aggressive way in support of a political or social cause (often associated with extreme left-wing politics).