Relating to military tactics and operations designed to fight against guerrilla warfare and irregular combatants.
From counter- (against) + guerilla (from Spanish 'guerrilla,' meaning small war). The term developed in the 20th century as militaries faced unconventional warfare tactics.
Counterguerilla operations completely changed modern warfare—instead of fighting armies, soldiers had to learn to navigate jungles, win local populations' trust, and fight enemies without uniforms!
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