I guess you're talking about this one?
Code:
event('village_spoils', triggers='village_destroy', run_count=1, group='village_destroy', priority=pr_map_res)
You must defeat the RNG gods when conquering a newly discovered village in order to get it selected from one of the random outcomes from the conquer option. Given the limited number of villages to play with, you'll probably want to re-enable debug mode in options.rpy so that you can rollback scum repeatedly in order to finally get it to come up.