Diplomacy Wiki

An Alliance is an agreement made between two or more Great Powers to contribute their combined forces to a common war effort. Alliances take many shapes and forms but are one of the most essential aspects of gameplay in Diplomacy. Generally speaking, alliances are either defensive or offensive in nature and are rarely declared openly. As with all agreements made in the game, no alliance is binding and can be violated at any time.

Common Alliances[]

  • “Anglo-French Alliance” - A military alliance between England and France, often formed to defend against a German invasion.
  • “Juggernaut” - An alliance between Turkey and Russia designed to allow easier subjugation of Austria-Hungary.
  • “Western Powers” - An alliance between England, Germany, France, and sometimes Italy; almost always formed to halt a western push from Russia.
  • “Central Powers” - Usually a defensive alliance formed between Austria-Hungary, Germany, and Italy to hold off simultaneous attacks from the east (Russia) and west (France).
  • “Allied Powers” - Usually and offensive alliance formed between Russia, England, and France in an effort to more favorably attack Germany, Austria-Hungary, and Italy.
  • ”Mediterranean Alliance” - An alliance between Italy and Turkey, Turkey and Austria-Hungary, or Italy and Austria-Hungary; usually made for the sole purpose of crushing the Mediterranean power not involved in the alliance.


Without a doubt, maintaining strong relationships with neighboring nations is the only way to even have a shot at winning in Diplomacy. Alliances are the most effective way to gain ground and to form alliances players need to have a working relationship with as many other nations as they can. When correctly applied, offensive military alliances can quickly and effectively remove a nation from the board. As such, it’s important for players to make sure that they are never the odd man out.