Western front was the arena of battle which saw some of the fiercest fighting on world war 1. The Germans had a stranglehold in areas of France and the nations that border there.
The area was heavily fortified to repel attacks from the allies. There was many defender that were placed to defend the positions. The main things were trenches and outposts with machine guns etc.
The heaviest pounding ever seen in history at the time had resulted in huge number of losses on both sides.