The Battle of Darga's palace occurred in 19 BBY in Darga the Hutt's palace.
Background
An Alderaanian Resistance team had came their to investigate Darga Jiramma Mionne's connecting to the Sarlacc Project and were staying in the palace as guests. When they discovered the Jedi Denia imprisoned there, Darga's men turned on them, starting the battle.
The battle
In the resulting chaos, Darga fled his palace and left for Bespin and the team succeeded in escaping, along with Denia.