Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. John Williams Gunnison (November 11, 1812 - October 26, 1853) was an American military officer and explorer. Gunnison was born in Goshen, New Hampshire in 1812. He graduated from West Point in 1837, second in his class of fifty cadets. His military career began in Florida, where he spent a year in the campaign against the Seminoles. Due to his poor health he was reassigned to the Corps of Topographical Engineers. Initially he explored unknown areas of Florida, searching for provision routes. However, his health soon forced him out of Florida entirely. From 1841-1849 Gunnison explored the area around the Great Lakes. He surveyed the border between Wisconsin and Michigan, the Western coast of Lake Michigan, and the coast of Lake Erie. On May 9, 1846 he was promoted to First Lieutenant.