This is a Motte and Bailey castle siege designed to show the how bands of Raiders and Outlaws whould prey on small and defenceless communities. You (luckily) have defences in place for such needs. This siege is for defending ONLY! To create the effect of unpreapeard attacks sav-map has been used so set the community up.
Your son saw then coming. He was on duty on the outer defences. He now had an arrow in his back. They came, rushing, like an unstoppable tide of death and destruction. As you survey the battlefield, now scattered with bodies and rubble, your archers fire rounds of needle-sharp arrows at the invaders. The savages. The barbariens. They left no structure standing.
Please note any writing mistakes. This is NOT part of the 'Toolbox' campaign.
A pretty fun map to play. In the story you mention it being unprepared attacked it might of been funner to have troops grouped around the barracks waiting for orders than already on the wall. I also would of personally liked more melee troops.
On normal I won at the keep which is pretty good balance. The thing that helped me the most was the pitch.
This type of map has been done many times. However it has some nice castle design. The story does nicely tie in with the map thats always good.
Map Design: 2
Unfortunately the map design is not very good. The main problems are everything besides the castle is pretty bare, it seems the trees were there only to fill it up not for realism. In general having a straight up cliff should be used rarely it looks rather ugly, if you want unpassable mountains try hills with a range of moderately taller mountains. Sometimes cliffs will be coming out of the side of the map but they will mostly be large plateau's.
Very short but interesting story.
Additional Comments: You seem to be a good mapmaker but it looks like you should download some maps and play them to a get a feel for map design.
My map The Anniversary will give you an idea about map design although its not the best, it would be nice if it got a review as well.