I'm no good at reviewing so I'll leave a few comments.
For your first try at map design, nice work. (Although most of the map is covered with trees. ;) )
But there are a few things that bothered me. One, is the Ruined City of Gergion, doesn't look ruined at all. Its just abandoned. You should add some city walls and damage them with tiggers or you could put some Petards near the walls and kill them for more realistic damage. And also damage the buildings and add some skelatons.
Second, when I started the scenario, I had no idea what to do. You should add a trigger that displays a message, "Bring [unit] to [area]" and then activate the war trigger. Without that message, people will just scout the map or build up their city and not know what to do.
Thats pretty much it. But if you fix those imperfections, this will be top notch scenario!