what happened to this state during the eighteenth century?
A fort was built by the French which later developed into a town.
Michigan
In 1701, French explorer and army officer Antoine de la Mothe Cadillac founded Fort Pontchartrain du Détroit or "Fort Pontchartrain on-the-Strait" on the strait, known as the Detroit River, between lakes Saint Clair and Erie. Cadillac had convinced King Louis XIV's chief minister, Louis Phélypeaux, Comte de Pontchartrain, that a permanent community there would strengthen French control over the upper Great Lakes and discourage British aspirations.

The hundred soldiers and workers who accompanied Cadillac built a fort enclosing one arpent (about , the equivalent of just under per side) and named it Fort Pontchartrain. 
where does the disney movie frozen take place Arendelle. which actors were cast as main characters? Kristen Bell and Idina Menzel. where was the former mentioned actress born? Huntington Woods, Michigan, a suburb of Detroit. what were some of her early works? "Raggedy Ann and Andy", "Polish Wedding", "The Adventures of Tom Sawyer", "Pootie Tang", and "The Crucible". what is the second movie all about? It is about a family in the Polish American community of Hamtramck. where is this aforesaid place located? It is a city in Wayne County in the U.S. state of Michigan.
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Michigan [SEP] 18th century
Marie, though most of the rest of the region remained unsettled by Europeans. France offered free land to attract families to Detroit, which grew to 800 people in 1765, and was the largest city between Montreal and New Orleans. French settlers also established small farms south of the Detroit River opposite the fort, near a Jesuit mission and Huron village. From 1660 until the end of French rule, Michigan was part of the Royal Province of New France. In 1760, Montreal fell to the British forces ending the French and Indian War (1754–1763). Under the 1763 Treaty of Paris, Michigan and the rest of New France east of the Mississippi River passed to Great Britain.