If they made it through no-man's-land, they would be assaulted from the trench line, typically with multiple machine-gun firings that could kill a whole group

Trench seizure was a slow, tedious and dangerous affair with progress often measured in feet/yards

Typical attack Strategy

Began with a artillery barrage, giving the defender time to strengthen the front Line

Signal, such as a whistle, was given to tell infantry to go "over the top" of the trenches and assault the opposing line