The Michigan War refers to two separate but connected armed conflicts fought by the Peninsular Republic and later Empire. The first was the invasion of the Lower Peninsular by the "Lake People" in the mid 2250s. The second was the war against the Megawatt clan fought in the Upper Peninsular itself.
The Peninsular Empire had come to dominate the northern half of the Lower Peninsular by 2240. They would expand and create colonies in the Upper Peninsula in 2245.
Lake People War
Mysterious attackers began to attack and rob boats on the sea