First post so please forgive me if I have formatted wrong/wrong place to post questions etc.
Playing as the Nakalim on new update I'm looking to "vassalize" some minor factions with the Last Empire Affinity. How does this work? I have the usual 50 relation with them but I don't see any new options. Just the usual praise, assist and declare war options. And doing the assist quest assimilates them as normal. Is the option in a different menu perhaps? Any help would be much appreciated!