1. TheSentry Looks out for the rest of the group Duty WATCH Military sense - a soldier who guards or prevents unauthorized access to a place, keeps watch for danger

2. The poem is about: being stuck in a trench hoping that the shells wont find their target the consequences of being too near a shell explosion how the realities of war had taken away the glory of it and the want of being there the futility of war how they had to forget the things that happened to survive (psychologically) but also about how they cant