Stop troops coming over english channel from engla

[ket222]

As the french, I destroyed the English boat between France and England, and placed three war ships in the english channel (one on the left, the middle and the right section of the channel). Why can the english armies still invade France over the Channel? they don't even have a boat What can I do, please
Also, I have thrown huge armies against the Swiss who invade burgundy but lose every time--any thoughts about what to do, as well as general strategies for france in latest period?

[PanthaPower]

This is because of the "land bridge" between these countries. You should be able to get a mod (go to the Dungeon) to remove the landbriges (also the one between marocco)