A way to end the war with chalced [posible spoilers]

[redchild]

There are other ways to settle matters between nations than outright war.
In fact, Chade's job is to do just that: to protect the Six Duchies by preventing war before it starts.
Fitz's interference managed to avoid a possible rebellion/civil war by Rippon.
Kettricken's marriage with Verity and Dutiful's marriage to Elliania cemented a peaceful alliance with the Mountain Kingdom and the Outislanders-- two nations who were once belligerents are now allies.
Kennit's unification of the Pirate Isles, while not bloodless, I believe has saved more lives than it cost.

There are probably more examples but I can't think of anything right now.

Chalced is also a powerful nation that many foreign countries depend on for trade. To topple Chalced would rip a great gaping political and economic vacuum that would devastate not only Chalcedeans, socially and economically, but those who had previously depended on them.

I think the Chalcedean people and their culture needs to be further explored, and whether the wants of the people are the same as those of its leaders, especially the ones who control the military. Just as the Outislanders are presented as the 'bad guys' in the Farseer series, we are presented with a much closer look in the Tawny Man series and we find that not all Outislanders are bloodthirsty barbarian killers. A few rotten apples shouldn't spoil the bunch.

All the information we've had about Chalced so far are stereotypes presented by non-Chalcedeans. The merchant Sinad Arich is the first Chalcedean we meet whose actions implies that Chalced has its own internal problems to deal with, and perhaps premature judgement would not give you a good idea of what Chalced is made of.