It seems a barbarian galley can enter your civ borders despite you have built the Great Wall!
I don't know if this is a bug or is working as expected, as makes sense you can't build a wall on sea
Anyway, welcome to barbarian galleys again! They weren't in vanilla or warlords...
Edit: Removed the screenshot due to quota issues.
I don't know if this is a bug or is working as expected, as makes sense you can't build a wall on sea

Anyway, welcome to barbarian galleys again! They weren't in vanilla or warlords...
Edit: Removed the screenshot due to quota issues.