I have borrowed A Guide to Military History on the Internet by Simon Fowler, a comprehensive Introduction for Genealogists and Military Historians, from the library. Historical Novelists and those interested in history will also find it useful.
"There are thousands of websites devoted to British military history...Do you really want to go through all of them to find the one you want? I have saved you the trouble of trawling through Google to find the one you want. All you need to do is type the website address (URL into your browser."
So far, although I've only dipped into the guide I am impressed. "The scope of this volume is roughly between the Norman Invasion in 1066 and The Good Friday Agreement in 1998, which saw the beginning of the end of British military activity history.
This is a book for me to add to my own library