Right now despite being new i think messengers are very under-utilised fetchers for people and don't actually convey messages, their role to be chosen for their social skills and discretion for holding meetings with local leaders the same way the outpost liason meets with us.
(Treasure Hunter(First contact)):
- If you are exotic enough, leader might be interested in speaking to you even if you are a stranger
- Might be able to exchange gifts between civ leaders and accept and give gifts yourself
(Fortress Starting Scenarios)Hill Dwarves)): "Relationship with surrounding dwarves"
So using messengers would be a way to achieve these goals, by sending them out to meet with relevant positions in other civs like royalty and local level leaders either appointed by you as puppets (via conquering the site and leaving a occupation force with the [SITE_FORCED] tag) or economically linked by baronies.
Insults and mistakes
In DF its pretty easy to step on people's toes,
whether you intended to or not, which is really when you're out to meet unknown (and for the big wait, procedurally generated or variable humans) civilizations you really want to bring a gift and someone gifted with a gentle and friendly temprement so that things don't go south fast.
> Sending out a terrible talker to make a diplomatic faux pas or bring out a artifact wooden bed as a gift for a elven civ is as problematic as it can get, next to having to clumsily be called upon to explain why you raided one of their towns.
*This is a masterfully depicted rendition of Evieth ShadowSong the elf queen rolling in muck, she is surrounded by 2 Sow's, it is written on a exceptional pig tail quire*
Quite a rude thing to send someone through the post in dwarven pictographic language, but if your intent is to sour relations it helps direct the point across. The obvious option to insult them at will (possibly to please or on request of others) and declare war for a reason (choose your own) without making the first move being open options.
But on the other hand sending them with tribute might help be able to improve relations & pay their way out of being captured when sending them to a enemy civ to say hello, discuss opening a trade treaty, declare war, insult and praise (mixed results)
> Like the previous raiding example, when they ask for a messenger to ask what happened, a especially good liar or negotiator may be able to save the relationship by softening the steep relations hit and hoping that they forget what happened.
AlliancesOnce a managable way to scale your rate of interaction & their opinion of you is put in place, doing particular actions with messengers such as sending out trained flatterers to praise the leader & offering enough tribute may improve relatons enough to successfully create a alliance between your civilization and theirs with benefits.
> In a conflict, both of your civs will be declared upon meaning that some civilizations may have a early advantage over others depending on how diplomatic their leaders are. Allies will intervene on sieges by arriving with a friendly force, but will ask for tribute afterwards if they are successful for their contribution.
> When attacking a site in a raid, the reprecussions of enemy alllies will be shown to you.