Fort de Chartres — Prairie du Rocher
Conflict era: French colonial / British / early American frontier history
Not a “big battle” site in the same way, but very important to Illinois military history. It was a major French fort in the Illinois Country and gives your guide a deeper America 250 timeline before statehood.
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Fort Massac — Metropolis
Conflict era: French and Indian War / Revolutionary-era frontier / early U.S. military history
Fort Massac is another major military-history landmark in Illinois. It helps tell the story of the Ohio River frontier and early American expansion.
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