IMTU the Imperium is TL16 and facing off a threat to spinward of the Guild Droyne Worlds who are TL17 (both high stellar) this is in the year 1323, so whatever happened has happened as to not get bogged down in discussions of the past. I will be using CT though as of the rulesets I have, it's the quickest/easiest to use.
Any worlds, sources or examples for discussion would be helpful.
Any worlds, sources or examples for discussion would be helpful.