This recorded lecture from Yale on trench warfare is part of a course on European Civilization, 1648–1945. This lecture analyzes the role of trenches in defensive warfare during World War I. Included are the effects of trenches, barbed wire, and new artillery that led to a new style of horrific warfare. Pair it with a reading and film: Merriman, John. A History of Modern Europe: From the Renaissance to the Present, pp. 973-1016. Film: Paths of Glory.