Bonus material! - SPI's
test series Tannenberg
game included, as well as 1914 Revision Kit!
Game Rules in PDF format
Game charts, log pads, and counters
A full size 600dpi JPG map of the game board
Plus - A PDF with Avalon Hill General magazine articles on it
This is a very nice to have addition for the game with scenarios, variant counters, and additional rules, commentary, and discussion.