Sleepy Hollow High School was the site of the Operation Bite-mark rendezvous. According to Mark Hammond, the school had emergency food supplies hidden inside and a squad of soldiers were to meet them there. His last contact with them was a month before.
When the heroes arrived, the squad had been completely wiped out. Local survivors, hearing that there was food there, attacked, along with zombies.
The heroes added two new team members here: they found Cassandra trapped by zombies in a cage here and 10K shot several attacking zombies, saving Doc and others.