Countermortar fire refers to defensive artillery fire that is used to suppress or destroy enemy mortar fire. Synonyms for countermortar fire include counterbattery fire, counterartillery fire, and suppression fire. These terms all refer to the same technique of using artillery to counteract and neutralize enemy fire in order to protect troops and equipment. A related term is indirect fire, which refers to the firing of artillery or mortars at targets that are out of direct line of sight. No matter what term is used, countermortar fire is an essential tactic in modern warfare, and knowing how to employ it effectively can make the difference between victory and defeat on the battlefield.