The war plan for MIA is pretty simple. Given their city layout they will make it very easy to rip through them if we can crack the first layer. We will want to concentrate about 50% of our cannon in the center of the line along with the majority of our cavs. Step one, move a cannon stack next to an MIA city along with a boat load of cavs and defenders. Step two, bombard, attack and capture city one. From there we can use our three move cavs to strike into the heart of MIA.
We will want to coordinate such an attack with an Nutters amphibious landing on either the SE or SW coast. I would recommend the SE for easier logistics.