Tarok was a M-class moon in the Delta Quadrant, location of a Kazon-Ogla training camp. There were enough concealed weapon systems on the moon to destroy the entire surface, including phaser banks, force fields, and photon dischargers. These generated a large amount of radiothermic interference, making sensor scans of the surface impossible.
In 2372, Commander Chakotay and the Kazon boy Kar transported to Tarok after escaping from Kazon-Ogla First Maje Jal Razik. They were later rescued by landing parties from the USS Voyager and the Kazon-Ogla. (VOY: "Initiations")