I have to disagree with that.CDiehl wrote:It's also possible that if the Federation sent ships to aid either side, Klingons on both sides would decide the Federation is trying to make themselves the kingmaker, and unite against them, so no matter who wins, the alliance would be flushed.
The Klingons in general were never really happy with K'mpec's decision to involve the Federation in his succession, so they were probably not entirely happy with the situation even given total non-interference. Gowron would always be seen as 'the Federation's choice' by some on the High Council no matter what happened. Remember we learn in TNG 'Unification' that he had to re-write history to remove the Federation's involvement from the entire event or lose considerable face.
You are also forgetting the 'honour' issue. The Klingons would respect the Federation for honouring their agreement to stand by the Empire in battle. They would disrespect them for hiding behind the letter of the law and let declared traitors rebel against the will of the High Council. Remember how quickly the Klingons turned against the Federation in DS9 season 4? That is how much importance they attached to the Federation being seen to be their allies, irrespective of the legal technicalities of the issue.
Ironically, if the Federation had openly supported Gowron during the Civil War, the Federation/Klingon war of DS9 season 4/5 might not have taken place. Certainly, Gowron would have been more willing to accept any reservations his allies had regarding the Cardassian campaign if he felt that they were real allies and not simply fair-weather friends who were likely to bail no matter what the real situation. The very real fact is that Gowron clearly interpreted the Federation's behaviour in the Civil War as cowardice and betrayal. That soured international relations and turned the invasion of Cardassian space into a watershed.