At least 56 assault fighters were preserved underground with a Vaadwaur battalion through the orbital bombardment of the Vaadwaur homeworld in 1484. They were reactivated in 2376 with assistance from the USS Voyager crew, with the intent of helping to break through the Turei fleet gathered over the planet. However, the Vaadwaur attacked Voyager instead in an attempt to take its technology. Many of the fighters were subsequently destroyed by the Turei, after Gedrin transmitted targeting data from a Vaadwaur sentry satellite to them.
During the late 15th century, these assault fighters were said to be very advanced using underspace to raid, destroy or even conquering neutral parties or enemies. After the bombardment of the Vaadwaur homeworld, the technology of the fighters become little more than antique against more modern vessels. (VOY: "Dragon's Teeth")
Later in the Void, a heavily modified Vaadwaur assault fighter was present revealing that at least one of them survived the renewed attack on their homeworld and were dragged into the region of space. But it is unknown whether it was commanded by actual Vaadwaur or was captured and used as a trophy by those who defeated them once more. (VOY: "The Void")
Offensive and Defensive systems
These assault fighters were armed with particle cannons, firing rapid pulse beams into enemy vessels giving them an ability to inflict a large amount of damage on enemy ships within a short amount of time but lacking photon torpedoes or heavier ordnance. But despite their weaponry, they are less than useful against more modern starships and the aggressive species in the Delta Quadrant. Despite their firepower, their shields are not able to withstand a single phaser blast from a Intrepid-class starship causing the ship to explode instantly.