Gameplay in Brief:
Played on a map of Europe circa 1900, Diplomacy may be the ultimate negotiation board game. The goal is to take over a set number of European countries, but there are no dice to determine the outcome of battles. It's done by mixing clever military tactics with superb negotiation -- and, usually, more than a little backstabbing.
A game of Diplomacy is basically a full-day commitment, but there's nothing quite like the feeling of convincing an opponent to help you secure your own victory.
For 2 to 7 players (best with 6 or 7), ages 12 and up. Diplomacy takes six to eight hours per game, sometimes more.
Diplomacy was designed by Allan Calhammer.
Diplomacy was originally self-published in 1959. It was published by Games Research in 1961 and is now published by Avalon Hill / Hasbro (with editions in 1999 and 2008). Editions have also been published by at least 10 other companies.
Diplomacy is a negotiation game with simultaneous movement.
Also by Allan Calhammer:
Diplomacy is by far Calhammer's best-known game. He also designed Hyperspace (1967, self-published) and Suriago Strait (1979, Nimrod Game Development). He is also the author of the 1999 book Calhamer on Diplomacy: The Boardgame "Diplomacy" and Diplomatic History.
Why Diplomacy is Part of the Games Timeline: