In the "Yesterday's Enterprise
" alternate timeline, the Klingons were kicking Starfleet's ass. That would suggest the Klingons are capable of defeating the UFP militarily. But what do the Klingons have that Starfleet doesn't? Who has more ships? Who controls more resources? What does it really take to win an interstellar war? What would the Klingons consider "victory conditions" versus what would the UFP consider victory?