You're so very nearly there - there are only two things that I can see as issues:
1. The legibility of the text on the small map could be improved - the script font you've got is really unclear at a small size - is there any chance you could find one that is slightly easier to read?
2. The legend box in the bottom corner with the two soldiers is a bit confusing. The red and blue don't correspond to anything on the map, when it looks like they might refer to the red/blue territories. I like the graphic you've used, but think it might make more sense to bring the two columns closer together, and have +1, +2 etc on the right?
The waves under the boats could use a tiny bit of smoothing though.
