It takes The Wandering Inn 10 volumes but eventually the main protagonist kills a bunch of slavers who try to enslave her after another side protagonist gets enslaved & escapes. The institutionalized slavery country though, whose politics is literally "Yay slavery!" still exists afaik and the last I read they were allying themselves with the terribly fucking written "I got transported to another world so I've decided to bring the gospel of American Christianity to the people" character against the "Yay necromancy communist utopia" country but I'm like 20-30 chapters behind probably so who knows at this point.

You've gotta read 8 volumes worth of "Yes, the world at large - well mostly...actually it isn't really 'mostly' but still...hates the slavery country and bans the slave trade" and various mentions of "the slave country should be destroyed" but nothing ever gets done about it plot wise until the slave country literally enslaves one of the main PoV characters and even then...he doesn't destroy the slave country because he has PTSD from being tortured as a slave but swears he's gonna come back to do so - which honestly, is probably how volume 10 will end if I had to guess (assuming it hasn't already...like I said, I stopped reading when the [Prophet] character got a bunch of chapters about how he's walking across the desert continent (home of the slave & necromancy countries) and has decided to destroy the necromancy country because 'unholy' despite the slavery country being right there...ok bro)