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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.
Rating Newest Oldest. Best Answer: Trench warfare was an extremely effective strategy because trenches were a form of defensive warfare. The Germans marched on Paris in 1914, but when they were halted they dug in. From then on both sides fought in trenches and neither side could break through.