Balith civil war/Legends

"There's a large-scale civil war on Balith. They've requested our assistance. Anakin, you will leave immediately to command the Third Legion."

- Obi-Wan Kenobi

Around 21 BBY, a civil war took place on the planet Balith in the midst of the Clone Wars. When the Galactic Republic's involvement in the large-scale conflict was requested, Jedi General Anakin Skywalker and Clone Captain CC-7567 were dispatched to Balith with the Grand Army of the Republic's Third Legion to assist one of the factions, which decided to pledge their allegiance to the Republic.

Behind the scenes
The civil war was first mentioned in "Assassin," an episode of the the third season of The Clone Wars TV series. The episode aired on October 22, 2010.