Battle against a Separatist dreadnought

In 19 BBY, during the Clone Wars, a battle was fought between a Galactic Republic Venator-class Star Destroyer commanded by Jedi General Chiata, and a Separatist Alliance dreadnought. Although the battle saw the destruction of the dreadnought, Chiata's Star Destroyer had sustained heavy damage in the fighting, which caused it to crash on the planet Zeffo after dropping out of hyperspace.

However, the crew of the Star Destroyer managed to survive the crash, but the Jedi General was separated from her Padawan, Jedi Commander Marseph, which forced her clone troopers to search for him. Amid their search, the Clone Commander and his troopers received Order 66, which resulted in an attack on Chiata and her Padawan. All the clone troopers were killed by the Jedi, both of whom eventually succumbed to their own wounds.

Text and facts from the “Battle against a Separatist dreadnought” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.