In the United States, American football is referred to as "football."[2] The term "football" was officially established in the rulebook for the 1876 college football season, when the sport first shifted from soccer-style rules to rugby-style rules; although it could easily have been called "rugby" at this point, Harvard, one of the primary proponents of the rugby-style game, compromised and did not request the name of the sport be changed to "rugby".[3] In countries where other codes of football are popular, such as the United Kingdom and Australia, the terms "gridiron" or "American football" are favored.