Kriegspiel

From BoardGameGeek:

"Kriegspiel is a full-scale wargame between two nations." In the advanced book it says "Of all the games in the Avalon Hill line this game is best suited for introducing novices to the growing science of game strategy." A basic traditional hex and counter turn based wargame, units having combat and movement factors. Combat results are done by computing odds (1-1, 1-2, 3-1, etc) and using a CRT by cross-referencing one of 4 defending strategies and 3 attacking strategies (no dice). Victory is by reducing the opponent to 20 combat factors or occupying all of the opposing cities. Advanced game adds reinforcements, weather, air power, supply, etc. Famous for the traveling Kriegspiel sold as the final item at the GenCon auction every year.