The IFW was a club which operated from sometime in the early to mid-1960s to approximately 1974. Founding members included Gary Gygax, Scott Duncan, and Bill Speer. Among other activities, they published a magazine variously called International Wargamer and The Spartan (not to be confused with Spartan International). The magazine occasionally included games and variants.
The organization was sometimes known as the International Federation of Wargaming.