Carnivore Battalion was a battalion that served in the 501st under Captain Rex. During the Battle of Devaron, Carnivore Battalion, originally stationed aboard the Resolute, manned AT-TE Walker 773 and, along with Execute Battalion and another brigade, accompanied by Jedi General Anakin Skywalker and Jedi Commander Ahsoka Tano, boarded a CIS ship and proceeded to hunt the bounty hunter Cad Bane, wanted by the Galactic Republic for numerous crimes.
The battalions fought off the droids on the outside of the frigate, and would enter the frigate's bridge and take out the droids there as well. A few men were sent to the hangar to recover a ship, while the rest located Ropal. They discovered he was dead, and a few men took the body back to the Resolute. The battalion fought in the artillery area, against Cad Bane, the bounty hunter who had captured Ropal, as well as a battalion of battle droids. The battalion fought the droids, but took a few casualties. A battle droid would accidentally mis-fire and hit a proton bomb, causing the hangar to collapse on itself. Rex, Denal, and a few other troopers would survive the falling debris. Skywalker would order them back to the hangar so they could escape.
Execute and Carnivore Battalions would rendezvous back in the hangar, along with the troops who had been sent to secure a shuttle. The troopers fought off as many droids and cleared a path to get to the shuttle to evacuate. Rex sent Denal and Koho to assist the General, while he ordered the rest of the company into the shuttle. Koho and Denal were killed, but the remaining members of Execute and Carnivore Battalions were able to escape.