Journey's End is quite a remarkable play. It's playing at the Belasco Theater and you need to see it. I provide a link to the Wikipedia entry but be warned that the description contains spoilers.
I don't want to ruin anything by explaining too much but I will tell you this.
It takes place in a trench in France during WWI. Occupying that trench is a squadron of English soldiers. The play explores the relationships between the officers. The playwright also tries to show us the many sides of valor and what bravery and friendship mean to men in times of duress.
It's good. It's Tony nomination good.
Try to see it.