They came from the SEA?!

[ridge]

I need some strats/tactics to fight nations from the sea. As a new player, I've found some good land nations to play, ones not too overpowered, not overly encumbered by age.

In a recent game as EA--Sauromatia, two ocean nations essentially ground my nation down until the stronger land nations began attacking. So what strategy do I use to keep from running around in circles from amphibian attacks.

My last attempt using mercs and water trinkets got me stomped. They have huge stacks of units in SEA with no where to go except attack a lone sea province.