I fought them about 10 years ago in game............I escaped by giving them eastern Hungary. They had Novgorod and Saxony on their side. They grouped their troops in a 100k+ Doomstack and killed all of my forces. I even tried mercs. Somehow they never died of attrition and the Discipline disparity was a killer. (115% to 103%) I can crush any nation in the game (I've beat down France 3 times) but them.......I have Defensive and Quantity. (That's how I'm close to them in numbers)
And this is how it looks in almost all my games by this point.........
And this is how it looks in almost all my games by this point.........