It appears thusly to me:
-Roguery improves bandit-class troops, prisoner conversion times, raiding outcomes and time, sneaking into enemy cities, stuff that makes your notoriety go away quicker, etc...
-Banditry takes the form of raiding, obviously, and about 3 or 4 different criminal quests in cities that drive up your criminal notoriety with the culture.
-So you raid and do quests which make you persona non-grata to a given culture, bugger off to somewhere else and do the same until your notoriety goes away. Not especially different than Warband TBH.
I dunno, in general, as long as you have a parent culture you don't fuck with and will give you safe haven, it largely seems like regular Bannerlord except the troop type you get all your benefits for will never wear above medium grade armor, use crossbows or field heavy cavalry. I dunno, maybe there's truly bad ass bandits like in Warband but Mountain/Sea/Forest/Steppe/Desert bandits are mid-tier troops and unless you're completely overwhelming your opponent, a standard army with heavy cav and enough arrows is gonna make mincemeat outta it.
But I'm planning on a run of that kind at some point none the less.
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For my game, I now own both castles adjacent to Sargot. Were it not for Charas, Vlandia would be completely blockaded behind Battania territory. The Battania AI followed my lead and gobbled up all the castles and territories near Sargot.
I want Charas to fall to close that loop, but the real prize is Jaculan. 4 villages! Among the Battania clans, only now are others starting to get up to 3 fiefs, which I've been at for a while. I could have claimed a lot of different fiefs the AI has taken over, but decided to strategically just hoard influence for the siege, capture and voting on Jaculan. Once you have more fiefs than other clans, your chances of continuing to get more are pretty much zero, so I've been bidding my time. The Battanian AI has tried to take Charas about 3 times now, one of which I participated in but we got chased off by a massive army. So I'm thinking I'll need to spearhead the effort the take Charas, let someone else claim it (otherwise I'd be at 4 fiefs), and then take Jaculan and hopefully win it. Shame you can't spend more than 200 influence on one action. I'm sitting on almost 700 now from the near constant warfare and not really spending it.
At one point we were at war with 3 kingdoms simultaneously. We'd been at war with Vlandia, then the Western Empire declared war to try and take back Lageta, City of Woe. Almost immediately after they declared war, Sturgia, like a Hyena at the edges of a fight, also declared war on us. Within about a day in game time, 2 castles and 4 villages across Battania were being raided or sieged. It's like all three AIs decided to pounce at the same moment. With so much influence I figured fuck it, we have to get a peace treaty with at least one of these. So I got one for the Western Empire pretty easily actually. A day later Sturgia agrees to pay a pitiful tribute to make peace as well, so we're back to just Vlandia.
I ride back to my fiefs because one, then two of them are being raided. All told I end up killing 5 separate armies totalling ~550 troops back to back to back as they keep running in trying to raze the same village I keep defending.
Shit be kinda nutty. But in general, I can walk away from most fights of equal numbers at a 10 to 1 kill ratio on realistic battle difficulty. Overwhelming amounts of heavy cav and lots of missile support makes mince meat of most armies. At least until reinforcements become part of the picture. Then things get very messy. It's easy to flank and surround a single foe in a 1v1 fight. But in big massed battles with lots of reinforcements, there's technically no flanking. Just a big mass of people dying like crazy on both sides.
As I get further and further from Battania proper, it's getting more annoying to get troops. I've been trying to run a thematic-ish army of mostly Battanian troops. I eventually gave in and also started recruiting Vlandian Crossbowmen and Cavalry, because:
1) they're "my people" now
2) crossbows absolutely fucking destroy. Battanian massed arrow fire is disgustingly strong, but it's even better with crossbow bolts mixed in. I can win most engagements without actual infantry. Vlandian Sharpshooters and Fian Champions are tough in meleee, they've got heavy gear and can take an infantry charge just fine. They just shoot until the enemy closes, engage in melee, then my cavalry just smashes into the whole pile and we win.
3) Battanian cavalry is, sadly, their weakest troop type. And since my war with the Vlandians I'v ended up with so much heavy cav as prisoners I figured, why not supplement the one real weakness of the Battanian roster?
Now I'd say my army is 25% Battania cav, 20% Vlandian Cav, 10% Imperial and random assorted Cav, 30% Crossbows and Bows and 15% infantry.
Monetarily, I'm around 200k gold most of the time. I'm now making FU money from post-battle loot, the kind of money where you can buy 90% of what's being sold with even caring what it costs. And yet, I lose anywhere from $1-$2k every day in upkeep because of funding garrisons. Is this what it's like to be the elite super rich? Constantly in debt but you don't care because there's always new money coming in?
Brother and Sister are all now grown up, maxed out on companions for the mean time. Kinda a shame that arranging marriages for your family essentially loses you family members in some (all?) circumstances. I tried to marry my brother to the widow clan leader of the clan my wife came from (RIP Eregon.) He ended up leaving my clan and joining their's. Maybe that's because he was marrying the clan leader, or something....? But it seems plausible that arranging marriages can't earn you new clan members, only lose them. Kinda sad, was looking forward to whole family trees going on with my clan. As it is everyone in my clan is going to be 100% focused on their work instead of their personal lives
Maybe when my kids are grown up (son and daughter now) things play out a little differently.
The noose is starting to close around Vlandian, and soon my RP backstory for the Rhodoks (a fusion of Vlandian and Battanian culture that resulted in crossbow wielding forest people) will be complete! But it's balanced on a knife's edge. All our neighbors are looking for the slightest sign of weakness on our part to pounce. If the WE is happy to keep fighting over Lageta and wasting their time on that rather than attacking into the flank of Greater Battania and my fiefs, then I can continue to focus on grinding Vlandia down and defending my turf. Vlandia lost about 20% of their holdings at this point and were it not for Derthert's enormous clan they'd probably not have the #'s to stop us.