Blockading Straits?

[Owain Glyndŵr]

In certain areas(marked by green arrows), it's possible for armies to cross bodies of water without the help of a navy. Is it true that you can prevent enemy armies from crossing by putting your navy there?

[Reynolds]

Aye you sure can, if ur playing as spain or portugal and u have a big enough navy you can pretty much cripple the moors in one go

[Owain Glyndŵr]

Excellent! That means I have the entire Danish army trapped on a tiny island. I'll just let them sit there while I take all of his cities.

[France]

Aye you sure can, if ur playing as spain or portugal and u have a big enough navy you can pretty much cripple the moors in one go

What he said.