Dragon's teeth was a phrase used in ancient Greek mythology.
In 2376, Captain Kathryn Janeway, along with the Vaadwaur Gedrin and Commander Chakotay discovered numerous Vaadwaur soldiers in stasis, from the year 1484. After seeing them, Chakotay told of the myth of dragon's teeth, which was the story of when a dragon was killed in battle, its teeth were spread throughout a battlefield. The teeth then took root and warriors sprung from them to continue fighting. (VOY: "Dragon's Teeth")