From the box:
Europe is your battleground and enemy castles your target in this thrilling game of military strategy. Your tactics range from highly planned to hit-and-run, as you deploy your troops: Choose from Spies, Generals and Diplomats to carry out your battle plans. Call out your Marshalls, Reinforcements, the Admiral, and, just once in the game, your Hidden Armies. Now roll the dice to see who wins each battle.

This version is associated with this version of Risk:
http://www.boardgamegeek.com/boardgameversion/69648