The Sontaran Tank was a large tank that Kroton encountered while fighting the Sontarans.
Its main armamant consisted of not only a tank cannon, but also something that resembled a missile launcher on its left side. Kroton encountered it after climbing a cliff and while the tank fired its cannon at Kroton, he managed to dodge it and used his metal staff to push the tank over the cliff, thus destroying it.
Kroton remarked that the tank was "a good piece of technology", but also disliked the Sontarans driving it and referred to the Sontraran driving the tank as a "monkey". (COMIC: Unnatural Born Killers)