He was chosen to go to Jabiim, which had declared their allegiance to the Confederacy of Independent Systems.

Afterwars, the Jedi, Alpha, and the clone troopers successfully finished the mission. That's when he got his name, Alpha, after an uncomfortable time with General Skywalker just calling him 'clone'. General Kenobi sent Alpha-17 with Anakin Skywalker to find the weapon that destroyed Ohma-Du'n, so that it couldn't be used in Theed Palace. Before they could investigate, they were under attack by the Mandalorian-hating bounty hunter Durge, and former Jedi padawan Asajj Ventress. When his unit arrived there, all they could see was ruins. He was sent to Ohma-Du'n, where a Separatist attack was suspected. He was going to destroy the lab by a self-destruct sequence, but after a plan that the four of them came up with (collapsing the walls, while Shaak Ti held the water), he gave up on the plan.

He fought with Jedi Generals Obi-Wan Kenobi, Shaak Ti, and Kenobi's padawan Anakin Skywalker on the water-world, Kamino. He first fought in the First Battle of Kamino, as did a lot of ARC troopers.

Star wars battle of jabiim