February is the worst month for "the war." Julian leaves notes in August's locker that call him a freak and an orc, but August refuses to report the notes. Summer, August, and Jack leave notes in Julian's locker, but theirs aren't mean. They make up a character named Beulah and leave love notes from her. Julian, Miles, and Henry also do things like steal Jack's gym shorts.
By refusing to report the notes from Julian, August starts taking his adolescent independence too far—it is Mr. Tushman's job to shut down bullying like this. The fact that Mr. Tushman isn't trying other means of helping August suggests he's unaware of what's going on.
All the girls but Savanna's group are neutral, but by March, people start to get sick of it. Amos even stops Julian from pouring pencil shavings into Jack's backpack. Finally, Julian starts spreading rumors that Jack hired a hit man to "get" him, Miles, and Henry. Nobody believes him and they even start making fun of him. By the end of March, everyone stops playing the Plague and lots of people will even accept pencils from August. One day, August sees Maya writing a note on Uglydoll stationery and he jokes that Uglydolls are based on him. The girls laugh and the next day, August finds an Uglydoll keychain from Maya on his chair. People are also pretty nice about August's new hearing aids.
The "hit man" is surely Justin, which shows that Justin's act of kindness is indeed having a real effect on August and Jack's experiences at school. When the other students don't believe Julian's rumors and they start abandoning the war, it suggests that it's exhausting and boring to maintain that kind of behavior long-term. This offers some hope that the social structure may be able to change for the better, as this does suggest that Julian's reign as top dog will soon be over.