Mission to Onderon (Clone Force 99)

Shortly after the formation of the Galactic Empire, the irregular clone commando unit Clone Force 99 was sent on a mission to Onderon to wipe out a supposed separatist outpost. However, the squad instead found a group of refugees from the rise of the Empire being protected by Saw Gerrera and his Partisans, who had once fought for the Galactic Republic. As the refugees included children, Clone Sergeant Hunter and most of his squad did not want to kill them. However, Crosshair, the team sniper, was insistent that they follow orders as he, alone among the squad's members, had been brainwashed by his behavioral modification biochip. After meeting with Gerrera and allowing him, his fighters and the civilians to depart, Hunter destroyed a viper probe droid which had been sent to spy on the squad by Admiral Wilhuff Tarkin. Realizing that they could not serve the Empire, Hunter decided to return to Kamino to rescue Omega, a young enhanced clone who had attempted to warn the squad about the mission.

Prior to their escape from Kamino, Crosshair had the effects of his inhibitor chip enhanced, retaining his absolute loyalty to the Empire and causing him to turn against his former comrades. Crosshair was later sent on another mission to Onderon to succeed where Clone Force 99 had failed, accompanied by a squad of new Elite Squad Troopers, who were human recruits instead of clones. Crosshair's forces killed all of the refugees at the camp, but discovered Gerrera was no longer there.

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