What new form of warfare, characterized by elaborate networks of ditches and fortifications, dominated the Western Front during World War I?

💡 Explanation:

Trench warfare, involving complex systems of trenches, dugouts, and barbed wire, became the defining characteristic of the Western Front during World War I. This static, brutal form of combat resulted from the development of powerful defensive weapons like machine guns and artillery, making open assaults extremely costly. Blitzkrieg and amphibious assaults are associated with World War II, while guerrilla warfare is a different style of irregular combat.