How the heck do you do galianport?

[Telhuin]

Yeah.. galianport.
I'm Okish at the game. I've beaten aliancasterer, but I can draw the line at something that overruns you in 2 minutes and soddenly flows past your walls despite the 2 mortars and 3 cannons there. How do you do it? Details please.

[hbarudi]

Had to restart lots of times, but terping a wall and then mortar outside of it have been helpful, then slowly I continued until I was able to nullify stuff.