After a brutal massacre at the monastery, the Peacekeepers sent their full might to decimate the Veneks. If any still survive, they are but a shadow of the might of their former selves.
Alternate Timeline Edit
In a timeline unaltered by time-traveling members of Moya's crew, a peace treaty between the Peacekeepers and the Venek Horde was established and the Venek presumably still worked alongside the Peacekeepers. This timeline may still exist as a unrealized reality but it is no longer the prime reality.
Veneks are derived from Farscape.