Battle of Phorose

"The ancient, temple-filled world of Phorose became the latest casualty of the intergalactic conflict when fierce fighting between Republic and Separatist forces reduced its capital to rubble"

- Endaw N'gard'm, in his reportage

The Battle of Phorose was a battle that took place around 20 BBY on the planet Phorose.

The Battle
When the Separatists invaded the planet Phorose, the Jedi sent Jedi Master Plo Koon and Padawans Ahsoka Tano and Barriss Offee to lead the defense of the planet.

During the battle, the Padawans were ambushed by Droid tri-fighters and felt in an underground temple, leading to their accidental discovery of a community of Ru. However, a group of battle droids ambushed the 2 Jedi, and destroyed the temple. After the temple's destruction, Ahsoka and Barriss decided to evacuate the remaining Ru to a safe location, far from the battle. Unfortunately, the Low Altitude Assault Transport/infantry carring the 2 Padawans and the Ru was ambushed by 2 vulture droids, leading to the death of Ru, with only 2 Ru and the 2 Jedi surviving.

Aftermath
"Anger, fear, hatred... these are the emotions of which a Jedi must be wary. But what about our guilt?"

- Barris Offee, questioning the ideals of the Jedi The battle ended with the Galactic Republic's victory, however at a great cost, as must of the Phorosian capital was destroyed in the battle and the majority of the Ru were killed.

After witnessing the death of these innocents, Barriss started to question the ideals and motives of the Jedi, believing that the Republic and the Jedi Order were culpable for their deaths. In time, she reached the conclusion that the Jedi Order has become an instrument of the dark side, by becoming generals in a war to protect a corrupt Galactic Senate. This encouraged to help in a terrorist act against the Jedi Order and blame it on her closest friend.