Final answer:
Trench warfare was the dominant strategy on the Western Front, whereas maneuver warfare was employed on the Eastern Front during World War I.
Step-by-step explanation:
The military tactics on the Eastern and Western Fronts during World War I differed significantly. On the Western Front, trench warfare was the dominant strategy due to the defensive advantages provided by trenches, machine guns, and modern rifles. Both sides were engaged in a war of attrition, with attempts to break through and gain territory mostly unsuccessful. On the Eastern Front, however, the Russian, German, and Austrian armies were more mobile and engaged in maneuver warfare, attempting to outflank their enemies. The Russian army initially had success against Austrian forces, but the Germans eventually outmaneuvered them and launched successful offensives. The Eastern Front also saw the largest and deadliest battle of the war, the Brusilov Offensive, where the Russian army overwhelmed Austrian forces.