Battle of Umbara/Legends

One of the most prolonged campaigns of the Clone Wars, a battle took place on the planet Umbara between the Galactic Republic and the Confederacy of Independent Systems.

Prelude
"Onaconda and I were often at odds, but I respected him. I respected him greatly."

- Mee Deechi, whose murder was followed by Umbara's withdrawal from the Republic

During the Clone Wars, the planet Umbara and its native Umbaran people were loyal to the Galactic Republic, being represented in the Galactic Senate by Senator Mee Deechi, a militarist politician who supported expansions for the Grand Army of the Republic. However, around 21 BBY, the second year of the war, Deechi was murdered by a fellow senator, Lolo Purs, who sought to cover her tracks as the culprit of the poisoning of Senator Onaconda Farr. The Umbarans subsequently withdrew their support of the Republic and allied themselves with the Confederacy of Independent Systems, bringing their advanced combat technology to the Separatists. As a result, the Republic and the Jedi Order launched a campaign to retake Umbara, sending Jedi Knight Anakin Skywalker and Jedi High Council members Obi-Wan Kenobi and Saesee Tiin as commanders for clone trooper detachments from the Grand Army.

The battle
"They're coming from all directions!''" "We don't have any cover!" "''We need to fall back, get them to follow us. If we can draw them out, we can see them. If we can see them, we can hit them!"

- Dogma, Fives, and Rex

After a rough landing, Skywalker reached the surface of Umbara with the 501st Legion and set out to capture the Umbaran capital. Later after following Krell's difficult commands, the 501 captured an umbaran airbase.

Behind the scenes
"Umbara makes the 2nd Battle of Geonosis seem like a Lake Country retreat."

- Leland Chee, on Twitter