The Red River Rivalry, also known before 2005 as the Red River Shootout, is a common name for the annual college football game between the University of Texas Longhorns and the University of Oklahoma Sooners. The series is considered one of the greatest rivalries in American sports.[1] The name is derived from the Red River that forms part of the boundary between the U.S. states of Texas and Oklahoma. The game originated in 1900, while Oklahoma was still a United States territory and the Oklahoma campus was still in Oklahoma Territory.[2] Until the 2005 meeting, the 100th meeting between the schools, the game was called the Red River Shootout. In 2005 it was sponsored by SBC Communications, and the game was officially renamed the SBC Red River Rivalry. Since 2006, with SBC's renaming as AT&T, the game is referred to as the AT&T Red River Rivalry. The term Red River Shootout or Red River Rivalry is also sometimes applied to meetings between the two schools in sports other than football.