Forts of the West: Military Forts and Presidios, and Posts Commonly Called Forts, West of the Mississippi River to 1898, by Robert W. Frazer

The number and variety of forts and posts, together with changes of location, name and designation, has posed perplexing problems for students of western history. The author has prepared a systematic listing of all presidios and military forts which were ever, at any time and in any sense, so designated. Lists are arranged alphabetically within the boundaries of present states, pertinent information is included and a map for each state shows the location of posts discussed.