Gary’s Combat Vehicle Reference Guide is what it says it is.
source material
Victorian Web
The Victorian Web site has a wealth of articles on life in the Victorian era. You could spend a very long time reading the material there.
Golden Age of Movie Serials Page
For fans of “Pulp” miniatures games, here’s a page with everything you ever wanted to know about the classic movie serials, like Flash Gordon, Dick Tracy, Fighting Devil Dogs and more.
Guide To Gaming The Russian Civil War
The Jackson Gamers have a very detailed guide to gaming the Russian Civil War.
Piracy Rules and Background Information
Chronofus has written a set of free miniature wargames rules called Piracy, and also an amazing amount of supplemental and source material on pirate captains, pirate history, pirate flags, nations of the Caribbean, slavery, clothing, weapons, currency, towns and more!