Stone Squad is a Green Marine squad in the Heaven Ops section of the IPPP. It is lead by Sgt. Walter "Dagger" Wilkins. There are three known members.
After the war ended, Cougar Squad was formed to contain the infection in Philadelphia. Dagger was transferred from Stone Squad to lead the new squad. Dagger handpicked the other members of his squad. Stone Squad members Ivyweed and Hup assisted in the mission.