Note: I'm on track to put this in my garage in World of Tanks....once I do the virtual world is mine! Seriously though. The game is a gold mine of information on WW2 armor. I've learned about more obscure tanks from that time period than I ever did by reading a book by one of the greats...it pointed me in directions and gave me a peek at stuff I didn't even know existed. Its highly recommended (the forum, if you don't want to play the game) if you're an armor nut.
