In 2370, one of these vessels, flown by Rabal and Serova, mined the Hekaras Corridor with verteron probes. After disabling the USS Enterprise-D, they boarded the ship and presented their case to Captain Jean-Luc Picard.
Serova, who was not convinced that her efforts were as effective as she had hoped, returned to her ship and withdrew from the Enterprise. She then began to overload the engines in an attempt to create a warp core breach. Ultimately she was successful in proving her theories, as the breach created a subspace rift. (TNG: "Force of Nature")