Commander Gree was one of the original Clone Cadets (Bly, Cody, Fil, Ponds, Wolffe, and Rex) to be trained by ARC Alpha 17 («Alpha») to become specialized Clone Officers. To whom he led and established his own unique battalion for Jedi General Luminara Unduli.

Commander Gree fought in many battles, and was assigned to many missions with other units Clone Troopers. Such as the 327th Star Corps., 212th Attack Battalion, 7th Battalion, and the 501st Torrent Co. He was often assigned with Jedi Master Yoda, mainly during the battle of Kashyyyk.

He was often assigned with Jedi Padawan Commander Barriss Offee with her platoon, which was also led by Platoon Sgt’s. Draa and Buzz.