On the planet of Malastare, a significant and intense conflict known as the Battle of Malastare unfolded during the Clone Wars. The Confederacy of Independent Systems sought to diminish the Galactic Republic's fuel resources by deploying a substantial army with the objective of seizing control of the world. However, a prototype electro-proton bomb, conceived by the Republic scientist Sionver Boll, was used to disable the army. The detonation of this bomb resulted in the formation of a considerable sinkhole, which in turn led to the awakening of the Zillo Beast.
To sustain its Republic Military operations and maintain its offensive capabilities, the Galactic Republic needed access to Malastarian fuel. With the Separatists poised to conquer the planet and capture the royal palace, Supreme Chancellor Sheev Palpatine authorized the deployment of an electro-proton bomb to neutralize the Separatists' droid army. Jedi Generals Anakin Skywalker and Mace Windu were in charge of overseeing the entire operation.
In the year 21 BBY, after a prolonged period of combat, the Confederacy was nearing its goal of capturing Malastare, which would have given them access to the planet's extensive fuel reserves. In response to this imminent threat, Chancellor Palpatine gave the green light for Republic forces to utilize the electro-proton bomb, an advanced superweapon created by Republic scientist Sionver Boll. This device was designed to incapacitate entire armies of droids and vehicles within its electromagnetic blast radius. Despite Windu's initial concerns about the potential impact of the weapon on the planet's delicate ecosystem, he and Palpatine eventually reached an agreement, influenced by the Chancellor's strong urging.
As the massive droid army, led by the T-series tactical droid designated TN-123, advanced towards the plain near the royal palace, the droid commander issued the order to commence firing. Thousands of battle droids unleashed a barrage of fire upon the outnumbered Republic forces, who were under the command of Captain CT-7567, also known as "Rex." He instructed his men to resist the droid forces until the bomb could be deployed. While Rex and the soldiers of the 501st Legion managed to eliminate several battle droids, the Separatists retaliated by launching multiple squadrons of Hyena-class Droid Bombers and Vulture-class droid starfighters to bombard the Republic's positions. RX-200 Falchion-class assault tanks, Dug rail guns, and Dug debris loaders successfully shot down a number of the enemy fighters, but the resulting crashes led to the destruction of several All Terrain Tactical Enforcers.
In response, the Republic deployed its BTL-B Y-wing starfighter/bombers, which were escorted by ARC-170 Starfighters and V-19 Torrent starfighters. The numerous Armored Assault Tanks attempted to shoot down the Republic fighters and bombers, but their efforts proved unsuccessful. A group of Dug warriors riding Insectomorphs launched a charge against the enemy lines, but they were swiftly killed by several DSD1 dwarf spider droids. Despite sustaining heavy casualties, the clone troopers valiantly managed to hold their ground.
Finally, the Y-wings reached the designated drop zone and released the bomb. The initial explosion created a massive blast that expanded into an even larger electromagnetic field, which obliterated the entire droid army and caused all electronic systems to shut down.
Following the initial detonation of the bomb, a significant sinkhole appeared, swallowing several Republic vehicles and [troopers](/article/trooper]. This event also triggered the awakening of the Zillo Beast, a discovery soon made by Windu, Clone Commander Ponds, Trapper, and Hawkeye.