The So'mA class cloaked tank is a prototype vehicle used within the Klingon Empire.
These vehicles have only been recently introduced through field tests on the more remote of Klingon colonies. The cost of producing one of these tanks forces production of them being only on the more established of colonies. Due to its prototype status, its full capabilities were not known at the time but the true aim for the production of these vehicles was in order to gain the use of a miniature cloaking device for use on vehicles. This renders the craft invisible and thus able to avoid detection by enemy vehicles.
(TOS game: New Worlds)