Question about the map "Empire of the World".

Thank you for the maps, I'm trying them out.

Here's a map I created. I just want to ask: How do I make the enemy attack me? They just sit in their castle and only attack if I pass by with a small army. I'd like them to head straight for my castle. If they die, I want a hero with the same characteristics as me to be born in their city, but with a larger army, and then attack again. How do I "program" that?