Ok I know that Romulans could have been fighting the Borg as per the “destroyed bases” aslong the neurtral zone thing from TNG.
But in the Voyager episode Unity, Chocotay is linked with the Borg and sees the Borg fighting D-7’s, Birds of Prey, Romulans, and other races.
When did this happen. And furthermore… How did the Klingons and Romulans, and cardasians defeat the Borg? They must have done a good job. I don’t believe that either race is so inferior that the Bog just chose to leave them alone. Becaus they assimulate worthless little cultures like Icheb and some of the other delta quadrant races.