Fire intended to neutralize or destroy enemy weapons(noun)
WordNet. Princeton University. 2010.
Use "counterfire" in a sentence
"Donovan saw more intense combat, but Truman had been a conscientious artillery captain, receiving commendations from his superiors and reacting coolly when German field guns and planes rained counterfire on the battery he commanded."
"The soldiers responded at first with counterfire but then paused because of the "OGA dropping bombs," including three 500-pound explosives, according to an Army field report."
"When Palestinian militants launch rocket attacks intentionally from within civilian Palestinian areas, using civilians as human shields as they intentionally target Israeli civilians, they are themselves responsible -- and no one else is -- for the civilian deaths caused by Israeli counterfire."