Battle of Mygeeto The Battle of Mygeeto was one of the longest battles of the Clone Wars , lasting for two years beginning in 21 BBY . In 19 BBY , it became part of the Galactic Republic ' s Outer Rim Sieges to secure the planets of the Outer Rim Territories . The battle . Early conflicts ( 21 – 19 BBY ) . The first conflicts on Mygeeto began in 21 BBY when the Galactic Marines provided a diversion for Walon Vau and Delta Squad when they secured funds from the Vau family vault below the surface of Mygeeto . Conflict went on for two years until Supreme Chancellor Palpatine declared Mygeeto part of a " Triad of Evil " , three planets which formed Separatist bastions . Along with Felucia and Saleucami , Mygeeto was singled out as a prime target whose fall would help end the conflict . Mundi ' s arrival ( 19 BBY ) . Republic forces were dispatched to the system and invaded Mygeeto . A light Separatist blockade was easily destroyed and the Republic soon began landing ground forces on the surface . Subsequently , the battle intensified on the planet , which was a major holding of the InterGalactic Banking Clan . Two major units participated in the battle , with a majority of the fierce combat falling upon the Galactic Marines . The unit fought the Separatist Droid Army in extended urban fighting amid the ultramodern towers of a major Mygeetan city . A second unit of the Grand Army involved in the battle were elements of the 501st Legion , who were sent on a special mission from the Chancellor himself . The 501st , according to Mundi , were dispatched to Mygeeto to destroy an energy collector which powered Separatist facilities in the area . However the true intent of the mission was to secure the Separatist power generator , and to acquire the ancient Mygeetan crystal powering it . The crystal was an experimental power source that the Chancellor required for a top - secret tributary laser - stream project codenamed " Hammertong " . After the Republic landed , the Galactic Marines began pounding the Mygeetan landscape with torpedo bombardments and fuel fires . The 501st were deployed at the southern section of a small city . Only one gunship could land , due to dual particle cannon turrets . Other gunships provided aerial support . An AT - RT was deployed and the 501st assaulted the southernmost bridge . The troopers took the bridge and captured the Confederacy ' s forward command post . Then the two particle cannon turret s were destroyed , allowing General Mundi to land . Mundi destroyed two shield barricades to allow the 501st troopers to advance . An outpost was captured and additional troopers were landed . However , things grew complicated when one of Ki - Adi - Mundi ' s fellow Jedi , Rivi - Anu , ended up shot in the arm and lost her lightsaber when ordered to secure the west flank . In addition , one of the Republic ' s " Venator " - class Star Destroyers was shot down over Mygeeto and headed towards the battlefield , placing several Republic forces in jeopardy . Anu instead decided to use the Force to hold off the doomed Star Destroyer long enough for Mundi and the rest of the Republic ' s forces to evacuate the area , sacrificing her life in the process . Mundi and Eon later reflected on her sacrifice . Heavy Separatist resistance came from AAT tanks . Also more AA guns were positioned at the north end of the central platform . The 501st , led by General Mundi , pushed the Confederacy battle droids ' line across the northern bridge to the building housing the energy collector . Ki - Adi - Mundi disabled shield barricades covering the entrances to the building . Destroyer droids in the compound proved to be a minor problem , and the energy collector core was destroyed . After Mundi had been extracted , the 501st retrieved the crystal samples . The troopers fought through a Separatist counter assault to the southern platform , and extracted the crystals via gunship . The battle went on for the Galactic Marines . During a concentrated Republic push to rout the Separatists , fighting spread across the cities of Mygeeto . Ki - Adi - Mundi skillfully used his lightsaber to deflect enemy fire , while leading a force of Marines supported by UT - AT assault vehicles and other heavy walkers . Tri - droids provided heavy fire for the Separatist army during the fighting and destroyed several UT - ATs . The battle intensified on a number of vast bridges , which stretched across a great chasm , linking several city districts . The clones continued to advance across the bridges . It was here that Ki - Adi - Mundi would fight his last battle . The death of Ki - Adi - Mundi . When Supreme Chancellor Palpatine issued the Declaration of a New Order , General Mundi was still on Mygeeto , commanding Republic forces . As General Mundi rallied his troops on a bridge spanning a chasm between two city blocks , with enemy droids destroying several UT - ATs , Commander Bacara was contacted through a secure , holographic comlink that was frequency - locked to a channel reserved for the Commander - in - Chief . The hologram was of a hooded Darth Sidious , Dark Lord of the Sith , ordering him that it was time to execute Order 66 . Bacara complied and moments later , on his order , the clones nearest General Mundi suddenly stopped fighting . Confused , Ki - Adi - Mundi turned around and was blasted by clone fire . The surprised Jedi Master managed to kill three Marines by deflecting their fire before succumbing to his troops ' fire . Aftermath . After Mundi ' s death , the newly established Galactic Empire would go on to conquer the planet , claiming it on behalf of Palpatine , who had now taken on the title of Emperor . The Imperial war - machine would keep strict control in the turbulent times following the wars , they extensively strip - mined the planet for a mineral known as durasteel , used in the construction of starship hulls . Behind the scenes . In " To the Vanishing Point " , the battle in which Rivi - Anu perished was supposed to have taken place on a different world from Mygeeto . However , " The Complete Star Wars Encyclopedia " authors established in Rivi - Anu ' s entry that the events of the story took place on Mygeeto .