Why are there so many French forts in US according to Wikipedia?!

Because France was trying to establish dominion over North America. However, France never had the large settlements that the British had for instance, relying on fur trading rather than establishing agricultural settlements. These forts were essentially outposts into the wilderness that provided a central point for this commerce, providing protection for the goods and the people handling them. Because France had relatively few numbers in NA, they largely tried to work with the Native population to conduct their business, as opposed to taking them by force. Despite this seeming "get along" approach, there were still plenty of hostilities, there were no police or courts and there was a real need for safe havens. As the true "first world war" started to heat up and France and Great Britain (and to a lesser extent, Spain) squared off to decide who would call North America theirs, these forts became even more important as strategic military staging grounds and last bastions of defense. As French forts fell, they became British forts.

"Dave, this conversation can serve no purpose anymore. Goodbye." 2001: A Space Odyssey

France used to own huge amounts of land (Louisiana Purchase), the U.S. bought this land from France and increased the size of the country at that time. France had establishments here just as England did back in that time period.

Deutschland hat die Weltmeisterschaft zum vierten Mal gewonnen! 🇩🇪🇺🇸