Uley pack

Sam Uley's Pack is formed when Sam Uley first phased in a wolf, on occasion of his coming of age in the presence of the Olympic Coven. Over time, Paul, Jared, Embry Call and Jacob Black also phase and Sam takes responsability for them.

New Moon
In New Moon, they avert their first crisis, when they killed Laurent in New Moon, who attempted to kill Bella, and chased away Victoria.

Eclipse
In Eclipse, the pack grows to ten, with the addition of Leah and Seth Clearwater, Brady and Collin. Hearing that an army of newborn vampires led by Victoria and Riley are on their way to Forks, Sam's pack agrees to co-operate with the Cullens against the army, after the Denali Coven refused to aid them. The battle is a success, with Jacob the most injured in action saving Leah from a hiding newborn.

Breaking Dawn
The pack splits in Breaking Dawn, following Jacob's and, later, Seth's and Leah's departure. A few months later, Embry and Quil also join Jacob's pack, something they weren't able to do previously. During the Volturi's trial, the pack (which by now had grown to twelve members) stands by the Cullens and their witnesses, ready to fight if battle ensues. During this confrontation, they find out from Edward and Aro that they are not real werewolves, but a group of a shape-shifters with the ability to turn into wolves.

Members
This pack consists of Sam Uley, Paul, Brady, Collin, and Jared. There are also seven unnamed members of the pack. Not wanting to fight his own kind during Renesmee's crisis, Sam declares truce between the packs and decides to watch the Cullens until she was born. After the tension between the two packs resolved, Embry and Quil leave to join Jacob's pack. By the end of Breaking Dawn, the pack gains seven new members due to the additional vampires in Forks.

Trivial information
In the films, the members of the packs have a tattoo on their right shoulders depicting their membership within the pack.