Bonus of Same Doctrine Countries Invasion

when you invade somewhere it gives always %25 , lets add it more strategical depth

when you invade provinces which core provinces of same doctrine country you will get +%10 bonus and it will start with %35 so you can use it even build more manpower at cities which you captured , dont forget people thinking like you in there

I invade country which has same ideas so people want to join my war and they will produce more at there think it like germany-austria , russia-belarus , cuba-russia it doesnt need be same nationality or language I hope you understand what I meant for example at ww2 many scandinavian joined to german army although germany invaded their country but there werent many polish or lithuanian at german army

so what it will bring to game

You want to play as allies

If you choose to Quebec you have to fight against many allies which has same units and advantages with you against enemies you havent advantages and differences , so bonus will come to help in here

If you play with British Odisha you will play against comintern and pan asian countries you have advantages against them and you can grow easily with using these advantages

you can add samples like germany - maranhao , nigeria - north ural , germany and nigeria will use their advantages against which are not same doctrines here , maranhao and north ural will have bonus advantage against their same doctrine neighbours