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The Cardassian ATR-4107 was an automated weapon capable of unleashing massive destruction. Although officially referred to as a missile, it can also be considered a completely autonomous warship in its own right. It was a warp-capable vessel carrying 1,000 kilograms of matter and 1,000 kilograms of antimatter – enough to destroy a small moon. The missile also carried a large cache of conventional weaponry, including disruptors, prototype quantum torpedoes, a thoron shock emitter and a plasma wave. On board was a sophisticated computer system that could predict and counter hostile actions.
In late 2370, the Cardassians deployed the missile to destroy a Maquis munitions base. However, the missile failed to detonate upon reaching its target. Maquis member B'Elanna Torres reprogrammed its computer and upgrading its systems to work for the Maquis, and eventually nicknamed it Dreadnought.