Also notably, the Kronstadt anarchists held a general assembly to dicsuss the question of "shall we accept Lenin's ultimatum, or fight a battle against the Red Army?" and decided democratically to fight.
(The battle was extremely bloody, anarchists lost and the Red Army won, at the cost of losing at least 5 times more people. Considerable numbers of anarchists escaped to Finland.)
In short: anarchists can use heavy artillery when needed, even if they know that war is not healthy - neither for them or the society they want.