The NR-N99 Tank Droid was a battle droid unit used by the CIS during the Clone Wars. It was first used during the Battle of Geonosis, the battle that would start the Clone Wars, where they proved to be one of Confederacy's best droid units. It had four large canons on its sides and two white "eyes" on the to of its droid body. It was used multiple times during the Clone Wars including the Battle of Kashyyyk and won many Confederate victories. After the Clone Wars, Tank Droids were used by the Galactic Empire to destroy the remaining Confederate leaders.