what happening were im at in the book

Now in the book Tommo's brother Charlie was shot in the leg during a night attack by the Germans. He got shot in the leg and had to be sent out of duty and back home. Tommo envy's his brother for being home with all his family. He also cant wait for Charlie to come back so he could feel more comfortable and everything. A couple days later Tommo experiences his first gas attack and panics but in the end makes it through. Though it didnt go so well for some of his comrades and friends.