The sergeant was in the Coruscant Guard, under the division of the Diplomatic Escort Group. The trooper and the Escort Group were assigned to protect Senator Kharrus and Senatorial Aide Jar Jar Binks on their mission to free Jedi Generals Obi-Wan Kenobi and Anakin Skywalker. The Group's shuttle was shot down, resulting in the deaths of Kharrus, Mack and the other pilot. The sergeant and Binks buried Kharrus' body, while the other three members of the Group scavenged the ship for parts. The sergeant returned to the ship and confronted CommanderStone about the problems they faced ahead.
The troopers and Binks would come under fire by pirates that had captured Count Dooku, Skywalker, and Kenobi. The Group were able to find cover within a geyser and get out before they were fried alive. The troopers developed a plan to rescue the Jedi, which succeeded. The troopers, Binks, and the Jedi escaped the planet on Skywalker's ship, the Twilight.