The Bombing of Callos was a battle in the Second Clone Wars and was the battle that ended the Galactic Empire's winning spree.
The battle
Imperial troops sent in hordes of TIE Bombers. Republic artillery fire took them down and the Empire was forced to send in Stormtroopers. The new Republic ambushed them and killed allot of them. The rest retreated, but were later killed by Callos Resistance members.