The Upper Surrey Street Intermediate Period

The Upper Surrey Street Intermediate Period was when The Upper Surrey Street Kids stole Greg's clan idea and created their own clans and became independent from Upper Surrey Street, causing it to collapse into c.12 clans in Book.13 "The Meltdown"

The Start
Greg created his own clan, which was unsuccessful and he had to desert his base. The next day, he saw that people created their own clans, which fought between themselves. He once joined Baby Gibson's clan by accident, after thinking he could take it over. He fought until the preschool group ransacked it.

The End
After seeing the Lower Surrey Street Kids sled on their hill, they quickly reunited and began attacking Lower Surrey Street.