Waiting for Ropi336’s mod update, I started modding my own Polish civilization several months ago.
It is very simple compared to the Eastern Europe Civilizations mod. I’m new to modding and it allowed me to practice.
There are very few new elements, I tried to take the game’s resources as much as possible (3D models, strings, icons…). I hope this will help the mod to survive through updates…
I’ll update the mod in the next few days. You can see the changes in this topic:
The update is online !
There are so many additions that it will be difficult to make a changelog.
But you can see a preview in the design thread I put above.
I also released an expansion that adds the Polish AI: Just Poland - Sobieski AI
I did this because this kind of mod is not compatible with other mods that add or modify AI. This is the case for some Civilization mods or even Age of Pirates.
Don’t hesitate to give us your feedback here !
The mod is incredible, thank you so much.
Now I think few stuff should be nerfed (but not a lot), the most obvious for me is the stable cost: it should be 250 wood. 1 normal stable + half a house is 250 wood. Plus it gives more advantages than a normal stable (natives upgrades). So I really think it would more balanced with a cost of 250 instead of 200. The other stuff is the amount of damages dealt by hetmans. I think it might be too much ? Maybe reduce it a bit as they already train units and bring bonuses to nearby units.
Ofc balancing is a hard topic on aoe3, so your mod is already incredible for what it is right now. Thank you again 
After several requests, I created a submod, which changes the flag and name of the Polish civilization to the Polish-Lithuanian commonwealth. Also adds Lithuanian voice lines to some units.
It’s “Not Just Poland - Commonwealth Submod”
@Prof624378 Thanks for your feedback! I also agree with certain points. We’ll see how we can improve this in a future update.
The mod has been updated. Here is the list of changes:
Fixes:
-Polish politicians added to Command Post (for Historical maps and Unknown maps).
-Fixes a bug that prevented the pilgrim from building Polish buildings (Plymouth and Unknow maps).
-The fort wagon is no longer silent.
-The cost of revolutions is no longer affected by Sejm.
Cosmetics:
-New church architecture added. Thanks to the Age of Pirates team!
-New 3D model for tabor added. Thanks again to the Age of Pirates team!
-New texture for the royal stable.
Other changes:
-Rename the “Polish-Lithuanian Union” big button to “Union of Lublin”.
-The Uhlans of Pulaski’s legion (US card) are no longer called “Prussian Uhlans”, but simply “Guard Uhlan”.
-Hetmans recruit more slowly.
-Piechur attack down by 1. But its wood cost is also reduced by 5.
-The Nadwor#nych Uhlan’s hitpoints are reduced by 5 and his attack by 1. But he takes only one population space.
-Companion speed reduced to 6.5 instead of 7. His hitpoints are also reduced to 420 instead of 450.
-Lisowczyky gain a very slight bonus against artillery (x1.25).
-The name of the Nadwor#nych Uhlan royal guard is now “Krakus”. His imperial version has an new unique skin.
-The Scythemen became the second royal guard unit, they were named “Partisans” and their damage area is increased with this upgrade.
-Add a card that unlocks the Winged Pistoleers (Winged hussars with a charged pistol attack).
-Changes the Thoroughbreds card to Royal Pastures, which only reduces the food cost of Royal Stable cavalry units, especially elite cavalry.
-Add the “Privateer Port” card: Ships 3 Privateers and enables them to be trained at the dock.
-Add the “Terror of the Borderlands” card: Increases Nadwor#nych Uhlan and Lisowczyky siege damage.
-Add the “Steppe Raiders” card: Lipka Tatars’ ranged attack gains a bonus against Heavy Infantry.
-Add the “Cavalry Interceptors” card: Companions gain a bonus against Ranged Cavalry.
Thanks to JiMMy12013, the creator of the Danish civ mod, for his game design ideas.
I am interested in this mod, but for some reason, I am unable to build barracks, towers, or trading posts.
PD: sorry, it was other mod the one making those bugs.