The Vaadwaur homeworld was an irradiated Delta Quadrant planet, devastated nine centuries earlier, where Voyager's crew revived a battalion of Vaadwaur soldiers from stasis in 2376.
The planet is the setting of the sixth-season episode Dragon's Teeth. Voyager is dragged into a subspace corridor, attacked by the Turei who now claim the network, and takes cover beneath the radioactive clouds of a dead world.
Among the ruins the away team finds hundreds of stasis pods. Seven of Nine wakes one occupant, Gedrin, who explains that his people hid there in 1484 when an alliance of enemies bombarded their cities, planning to sleep for five years. They never woke.
Janeway agrees to help the survivors escape, until Neelix uncovers old Talaxian tales of the Vaadwaur as conquerors. Their commander, Gaul, plots to seize Voyager. Gedrin sides with Janeway and dies; dozens of Vaadwaur ships get away.