Final answer:
Most battles on the Western Front resulted in large numbers of casualties for the attacking army.
Step-by-step explanation:
In World War I, battles on the Western Front resulted in large numbers of casualties for the attacking army. The use of new military technologies such as trenches, machine guns, and artillery made it more effective to defend a position rather than launch an offensive. The high casualty rates for the attacking army were due to the difficulty of breaking through enemy defenses. For example, the Battle of the Somme, a British offensive, resulted in 60,000 soldiers being killed or wounded on the first day alone.