im glad you are having fun playing the save

i wanna clarify some points you have brought up and make clear others
right as i started the save i gave myself several citys until i had 20 and tons of gold so i could stand the severe negative income that comes with having that many citys at the start of the game, so by all means, this save is in no way, shape or form a good indication of how easy or hard the mod is balance wise when it comes to difficulty or the bonus the AI gets, i intentionally made myself OP so i could have more fun and tests everything new the mod had to offer since i last played it wich was a long time ago
the reason why i had many Crusaders just sitting in my city doing nothing is because they start with the lead by warlord promo for free and can be upgraded without losing it, wich in turn makes them potentially incredible strongh troops by late game, and since you can upgrade them they never truly go obsolete, they are also the strongest meele units for their time and come with an extra movement points wich allows for inmense versatility and makes it a lot easier to get XP
never had any reason to upgrade the musketeers since the AI is obviously too far behind to do anything, but as i stated before, that was on purpose, never intended it to be a fair game for them but more of a testing match to see how far i could go and push things
i could mass cavalry from my capital at any moment promoted specifically for city attacks and multiple attacks per turn but never bothered to do it because i like to take things slow and by that time i didn't realise there were like 300+ militia sitting at the japanese capital for some reason
i only bought up the save when i ran into the defensive buildings problem i stated in the thread i made, it wasn't because i had issues taking cities or that i couldn't win but that taking them became a chore and no fun allowed min/maxing to take them in one turn, and i simply despise playing this way, i've played this mod before and these buildings weren't an issue back then (v30 or something like that was the last time i played) but now they were in my games so i had to bring the issue up
also if you are wondering why cities to the east of my capital have german names its because hitler apparently had a doppelganger right next to him

, i didn't wanna deal with TWO of them so i wiped one of them and leaved only 1 alive
That's why cities aren't supposed to even let units attack them if the defenses aren't reduced to a particular point - but I don't think he's using the Realistic Siege option so wouldn't be hindered by that.
that option makes little to no difference in reality, that's why i disabled it, when you can mass the amount of artillery i was fielding by then (60+) and they are properly promoted you can park your units two tiles away from the city, force march them for an extra movement point, and if nothing gets in the way you can move and bombard the cities defenses to 0 in a single turn and thust being able to attack unhindered with the rest of your troops, my siege units get the free morale promotion thanks to setir pit and that makes it so i don't even need to force march them to do the above tactic, taking a city in one turn is not hard, but its very tedious
So
@arthas125 is new to this mod it seems, or he really hates losing some units.
And yeah this bug seems to be here.
if i renember correctly i started playing this mod since the updates for RoM stopped, from then on i've been playing on and off but never finished a game yet, last proper version i played was v30 or 35 can't renember, then i switched to the SVN version instead
I haven't found evidence of that so far, at least not until I get to Fukishima since that was the city he was having problems with. The Da Vinci tank was already damaged before I started the game anyway so he was probably using it earlier to siege that city before. Now I don't know how long it was next to Dijon so I don't have any definitive damage data to prove that theory yet.
i think i spend quite a few turns in that save you are playing before i finally captured Kyoto and Then moved to Fukishima, wich is when the city defenses started instantly killing my units, so from where you are right now to when i encountered the defenses on steroids, quite a bit of turns might have passed, the second save i posted in my thread is right at the exact moment when this bug happends, not this one you are playing, i was still taking a ton of damage from those defenses ( a lot more than you currently are taking) but could at least move my units away if need to