It's a SHC1 1vs1 map.
For a bit more difficulty I turned the option off to buy wood.
And for the balance they aren't trebuches.
This is really a nice idea - to remake that map. I completely forgot about it somehow, and I disliked it in some mission. I was like "why would they make a map like this?", but after I won that Crusader Trail mission, and after playing it some more times, I like it, and now I'm glad you remade it. :)