The Battle of Mygeeto was one of many outer rim sieges led by the 501st Legion. While the battle was raging on, Order 66 was given and Ki-Adi-Mundi was gunned down by his own troops. However, it is a mystery why there was ever a battle on Mygeeto, as it was nothing more than a war-torn city that they were fighting over. However, it could be related to a droid power cell present on the planet.
Star Wars: Battlefront II[]
In the game, Ki-Adi-Mundi, along with the 501st, engage the droid army on the cold worn-out planet. The objective is to acquire a droid power cell and bring it back to a LAAT gunship. The campaign map features LAAT gunships flying around in the sky, similar to Geonosis: Spire in Star Wars: Battlefront, whereas the Instant Action and Galctic Conquest versions do not. In the mission, the objectives are to cross the bridge, destroy two particle cannon turrets (so Ki-Adi-Mundi can land), disable a shield, capture a command post, disable another shield, destroy the generators to destroy the shields protecting the power cell, acquire the power cell and finally return it to a waiting LAAT Gunship.