RACE: Fifth Indianapolis 500

DATE: May 31, 1915

WINNER: Ralph DePalma, E.C. Patterson

AVERAGE SPEED: 84.001 mph

WHAT HAPPENED: Italian-born Ralph DePalma, who immigrated to the U.S. as a child, finally wins the Indy 500. DePalma had dominated the second edition of the race before a mechanical problem in his Mercedes brought his car to a halt two laps from the finish. Britain's Dario Resta was second and Norway's Gil Andersen was third.

NOTABLE: Louis Chevrolet makes the first of his four Indy 500 appearances. While he would never finish better than seventh, his name remains a part of Brickyard lore. He co-founded the Chevrolet Motor Car Company in 1911, and the manufacturer continues to build cars for the Indy 500 to this day as part of General Motors.