WORLD HISTORY

Detailed explanation-1: -During World War I, trench warfare was a defensive military tactic used extensively by both sides, allowing soldiers some protection from enemy fire but also hindering troops from readily advancing and thus prolonging the war. Trench warfare was the major combat tactic in France and Belgium.

Detailed explanation-2: -The terrible casualties sustained in open warfare meant that trench warfare was introduced very quickly. Trenches provided a very efficient way for soldiers to protect themselves against heavy firepower and within four months, soldiers on all fronts had begun digging trenches.

Detailed explanation-3: -The trenches crisscrossing Western Europe during World War I were not a new invention. Trench warfare was already in heavy use during the American Civil War, half a century before. World War I, however, brought the trench to maturity.