Fort Chartres is a historic fortification located in Illinois, built by the French in the early 18th century. Constructed between 1753 and 1756, it served as a military outpost and a center for trade and diplomacy in the region. The fort was strategically positioned near the Mississippi River, allowing it to control access to the river and the surrounding territories. The fort was abandoned in the late 18th century and fell into disrepair. Today, Fort Chartres is a state historic site, where visitors can explore the reconstructed buildings and learn about the history of French colonial efforts in North America. The site offers a glimpse into the life and military practices of the time.