In The Great Hunt, it's mentioned, such as in here, that in many (implied to be all?) villages visited by the Seanchan that they left a burned/scorched patch of ground that village residents were afraid/unwilling to remove. It's further mentioned that Hurin scented violence at the first patch he encountered, and it was extreme enough to cause him to vomit and refuse to discuss what actually happened on that spot.
So what did they actually do? The book includes a number of concrete examples of Seanchan cruelty, but as far as I can tell nothing specifically relatable to what they did in these villages. Does a subsequent book reveal what sort of atrocities they actually commit?
And mildly related, do the burned patches have anything to do with the similarly-described swaths of burned countryside that Rand encountered periodically while in the portal-stone world? I assume not, since Hurin was there for those as well, and did not react strongly to the burned patches in that other world?