The Ventava Legion were a military group within the Romulan Star Empire.
The unpublished Last Unicorn Book The Dominion War: Fires of Armageddon mentions the Ventava Legion as one of the most elite units within the Romulan military. They only recruited members of the Tal Shava or Teth Koros who were veterans with three years of field experience. The admission test was noted as being so brutal that only half of those who applied to join survived. They performed missions that not even the Imperial Shrikes were accomplishing at and their brutality made them infamous throughout the galaxy.