Can I win a war with everyone? Advice?

[Ironhawk]

Make peace with the strongest?? Thats madness! If I was the strongest nation attacking you, I would be the least likely to sue for peace because I had the least to lose. I would drive to your capital and capture it for the gold and gems. No question in my mind.

Your best bet is to convince the weakest player to back off via threats and/or bribes. Then use that as a diplomatic lever to break up the alliance against you.