The Millicreep was an assassin droid used by the Umbaran militia during the Battle of Umbara at 21 BBY. It was about a foot and a half long and was easy to transport when deactivated. Unleashed by a company of Umbaran Militia when they ambushed a 501st battalion lead by Jedi General Anakin Skywalker, one of these droids killed numerous clones with its electrified tail before being destroyed by General Skywalker's lightsaber.