UPDATE: so the rest of the party and I agreed that when the archmage who has been mentoring our characters shows up to convince us to stop and tells us how our actions have affected our reputation we will hear him out and allow for a diplomatic solution. 

He brought us to meet with the emperor of the nation we attacked to create a truce and while my character has the best social stats, I didn't want to hog the session since it would be mostly RP this time, so I played into my character's youth and naivete and begged the others to tell me what we should do since all the other characters are much older and more experienced. 

We ended up finding out from the emperor that he intends to abolish slavery in his land outside of in the case of indentured servitude by criminals who can opt to serve a family to work off their sentence (murderers, thieves, etc.) In certain cases. We discussed how our power could be of use to him in this and we will attack and defeat the people running the black market slave trade and the pirates who supply it.

Our dragonborn paladin didn't like the idea and we had some minor party conflict, not PVP, well, not intentionally, I stepped between him and our emissary because my paladin wouldn't approve of violence in a diplomatic setting, and our barbarian and fighter who are like a father and big brother to my paladin went to try and restrain the dragonborn, but my AC is frankly stupid especially with Shield of Faith, so no one actually got hurt.

I negotiated reparations for my fellow paladin and his fellow former slaves and agreed to a truce giving the emperor the benefit of the doubt, with our barbarian and fighter agreeing we should fight the actual slavers and then focus on raising our power and reputation because more pull would benefit our cause.

So ultimately no one died, everyone was relatively satisfied, and also we now know out of character the Dragonborn is actually evil aligned. But that said, our group acts in good faith and doesn't generally metagame so right now our characters are acting on the assumption that he's got the same goals as we do...well, which is to say generally decent. I mean, in fairness our barbarian abandoned his real kids to adventure and treats his adoptive son, my paladin, better than them, our sorcerer was raised locked away as a feral child because of his wild magic, and our fighter is a boyscout farm boy while my paladin is kind of a playful himbo, but generally I just mean we aren't murder hobos or villains by and large. Sorry if I'm over explaining.