List of unnamed Vahklas-type starships.
Earth fleet []

A cruiser among the group
This cruiser was among the group of ships that welcome Enterprise NX-01 home after the Xindi incident in 2154. (ENT: "Storm Front, Part II")
Enterprise attack []

Firing on Enterprise
In 2154, two cruisers along with a combat cruiser attacked Enterprise while in orbit of Vulcan, forcing it to withdraw. The ships then proceeded to conduct an orbital bombardment of the Syrrannite settlement in the Forge. (ENT: "Awakening")
Battle of Andoria []

The Vulcan fleet
Several cruisers were part of the Vulcan fleet, ordered by Administrator V'Las to attack Andoria in 2154. Four D'kyr-type cruisers and several Vulcan patrol ships were also part of this fleet. (ENT: "Kir'Shara")