Welcome to Star Trek Answers. What would you like to know?

Considering that the Terran Empire was overcome by the Cardassian-Klingon alliance in the Mirror Universe, I think a Federation-Klingon alliance from our universe could beat them just as easily.

Harder to say how it would turn out without Klingon or other assistance, but I think the Terran Empire might have an edge because they'd fight dirty and the UFP wouldn't.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.