During the time of the Clone Wars, the bounty hunter known as Boba Fett carried out an act of sabotage against the Endurance, a Venator-class Star Destroyer, with the goal of assassinating the Jedi Master Mace Windu.
As part of the compensation Jango received from the Kaminoans for donating his genetic material to create the clone troopers of the Grand Army of the Republic, Boba Fett was created as Jango Fett's clone son. During the First Battle of Geonosis, in the early phases, Jedi Master Mace Windu killed Jango, an event that Boba saw happen.
Ultimately, Boba was taken in by fellow bounty hunters Aurra Sing and Bossk, both of whom had a history of collaborating with Jango. Sing pushed the young Boba to exact vengeance on Windu for his father's demise.