Though they had great success in the 70s, the Cowboys typically failed to advance in the playoffs. In compiling a season highlight reel for the 1978 season, Bob Ryan (NFL Films) needed a new theme for the highlight reel - different than many of the recent, "amost did it" type themes. Ryan noticed that most away games had Cowboys fans in attendance, so he dubbed them, "America's Team."
Bob Ryan Coined in 1979
Very appropriate nickname given that anyone who actually has been to Texas stadium can verify there are more passionate Cowboys fans outside of DAL.
"There is no charge for awesomeness or attractiveness." - Po (Kung Fu Panda)