Around 21 BBY, Jedi General Shaak Ti was sent to Kamino to oversee the training of clone troopers. The Citadel Challenge was created to test clone cadet squads to see whether or not the clones were ready to be sent into battle. Some squads, such as Bravo Squad, excelled at the challenge. But others, such as Domino Squad, were not as fortunate. Being unable to function together as a team, the squad would continue to fail the training assignment. But after overcoming each other's differences, the members of Domino Squad were able to overcome the Citadel Challenge and pass their final test.