Umbaran mobile heavy cannon

Help me, Obi-Wan Kenobi. You're my only hope.

This article or section is in need of referencing per Wookieepedia's sourcing guidelines.

This article needs appropriate citations. Help us improve this article by referencing valid resource material. Remove this notice when finished.

"Sir, we're overpowered. We need reinforcements."

―Captain Rex, to Pong Krell, during an encounter with the heavy cannons^[src]

Umbaran mobile heavy cannon (UMHC) was a model of walker used by Umbarans during the Clone Wars.^[1] Later, both the Imperial Army and Alliance to Restore the Republic used them during the Galactic Civil War, with the Alliance operating stolen Imperial machines and providing them to Saponza's Gang.^[5]

MHCs were heavily armored and had an articulated electromagnetic plasma cannon mounted on top of its dome-like body.^[1] The Imperial Military used a remodeled variant known as the Cold-weather Mobile Heavy Cannon. This prototype model was specialized in sub-zero temperatures.^[5]

During the Battle of Umbara, MHCs attacked Captain Rex and the 501st. The clones lacked the firepower to destroy the MHCs, so clone troopers Fives and Hardcase stole Umbaran starfighters and used them to destroy the MHCs.^[4]