During the Republic campaign to secure Umbara, the natives of the shadowy world unleashed all manner of previously unseen advanced technology against the clone trooper forces. The Umbaran MHC -- mobile heavy cannon -- is a titanic juggernaut built atop six powerful, ground-shaking legs. The dome-shaped body of the spider-like tank is heavily armored, able to withstand anti-armor infantry rockets. Mounted atop the dome on an articulated arm is a powerful electromagnetic plasma cannon. The monstrous MHC has almost no weaknesses.
The Umbarans possessed advanced weapons of war, including the centipede-like crawler tank which bristled with weapons emplacements. These slithery contraptions were well suited for crawling over the uneven terrain of the Umbaran wilderness.
In addition to ground-effect vehicles, the Umbarans also employed repulsorcraft like their hover tanks. More lightweight than the heavy ground crawlers, the hover tanks were heavily armed with plasma cannons.
Umbara came under assault during the Clone Wars when the planet seceded from the Republic to join the Separatist Alliance. The advanced military forces of the Umbarans were pressed into service defending the gloomy surface of their shadowy home world.
A single Umbaran soldier can operate all the systems of an Umbaran MHC from the confines of a ray-shielded control sphere. Umbarans have developed advanced holographic technology that allows them to control their weaponry with floating touch-panels made of projected light.