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2. trench warfare-a type of armed combat in which the opposing troops fight from trenches that face each other; instead of the war ending quickly, it became bogged down in trench warfare. armed combat, combat-an engagement fought between two military forces. Translations.
From Wikipedia, the free encyclopedia. Guerrilla warfare in the American Civil War followed the same general patterns of irregular warfare conducted in 19th century Europe. Structurally, they can be divided into three different types of operationsâthe so-called 'People's War', 'partisan warfare', and 'raiding warfare'.