fight song of the USC Trojans. The term "Fight On" is also used as a battle cry, often with the two finger "V" salute for Victory given in accompaniment. The V gesture has its origins with the ancient Trojans, who would cut off the index and middle finger of soldiers they conquered so the conquered could no longer wield a sword in battle. Jersey No. 55 "Tradition surrounds certain numbers at USC, most notably 55," wrote Gary Klein of the Los Angeles Times. "Junior Seau, Willie McGinest, Chris Claiborne and Keith Rivers," he added, "are among the linebackers who have worn a number that Trojans coaches have been careful to distribute." Wrote Andy Kamenetzky of ESPN.com in an article titled "Tradition of elite linebackers alive in 55," "Membership, along with the hallowed No. 55 jersey, has been offered to a select few over the past few decades. Names such as Junior Seau. Keith Rivers. Willie McGinest. Chris Claiborne. Names forever etched in USC lore." Rivalries In the first 30 years of USC football, the school maintained rivalries with local Southern California schools like Occidental and Pomona, but these ended by the 1920s when USC joined the PCC and grew into a national caliber team. "Perfect Day" A "Perfect Day" (a phrase created by the school's football announcer Pete Arbogast) to any USC fan is a USC win coupled with losses by UCLA and Notre Dame. There have been 63 "Perfect Days" since the first one occurred in 1921. Perfect days have been possible since 1919, when UCLA began playing football. Notre Dame USC plays Notre Dame each year, with the winner keeping the Jeweled Shillelagh. The inter-sectional game has featured more national championship teams, Heisman trophy winners, All-Americans, and future NFL hall-of-famers than any other collegiate match-up. The two schools have played the game annually since 1926 (except for years 1943–1945 when World War II travel restrictions kept the game from being played or 2020 due to the COVID-19 pandemic). Unlike most rivalry games, the game enjoys neither the possibility of acquiring regional "bragging rights" nor the import of intra-league play. The game has been referred to as the greatest inter-sectional rivalry in college football. Notre Dame leads the series 50–36–5 through the 2022 season. UCLA USC's rivalry with UCLA is unusual in that they are one of a few pairs of Division I FBS programs that share a major