A huge amount of United States Military training and other manuals are available for free online. Most of them are in the public domain, which means anyone can read and/or download them.
The biggest difficulty with trying to learn from these online manuals is sorting through the tens (or hundreds) of thousands of files, most of which are of little use or relevance (like a manual on how to service an obscure radar device that was used in 1958, for example). Here we will try to sort through what's available in free public domain format and post the most useful ones which can be used for your own education and training.
This page will give a few examples, there will be more added later to the site and more details.
Survival, evasion, and recovery manual (excellent) in PDF format
Large collection at globalsecurity.org
US Army Center of Military History. Massive list of documents available here.
US Army Center of Military History. Shorter list of top-level categories, in more modern format
