R. Star wrote:
The common explanation in the novels and fan maps is that Earth is right at the border of the Alpha/Beta Quadrants and the Romulans/Klingons are mostly in the Beta with Cardassia being on the opposite side of the Federation in the Alpha Quadrant. Though this gets problematic when you analyze just how the Klingons were able to invade or the Romulans were able to open their own second front against Cardassia.
Really, it's not the first inconsistency in Trek and hardly one of the big ones. I just roll with it usually.
You are so two-dimensional
Who is to say the Klingons had to traverse federation space to get there?