Mackinac Island Fort, also known as Fort Mackinac, is a historic military outpost located on Mackinac Island in Michigan. Built by the British in 1780, the fort played a significant role during the War of 1812 and was used to protect the straits between Lake Huron and Lake Michigan. Today, the fort is a popular tourist attraction, offering visitors a glimpse into military life during the 19th century. The site features restored buildings, reenactments, and exhibits that showcase the fort's history and its strategic importance in the Great Lakes region.