This Day in Auto History:

5.30.1897 The Erie & Sturgis gasoline carriage designed and built by James Philip Erie & Samuel D. Sturgis is given its first test drive in Los Angeles, CA 5.30.1905 Reo makes its racing debut as Daniel Wurges wins two of three races driving the Reo Bird at the Empire City track in Yonkers, NY 5.30.1911 William C. Durant and Louis Chevrolet announce plans to build a new automobile, the Chevrolet 5.30.1921 Tommy Milton wins the Indianapolis 500 in the Frontenac Special 5.30.1924 Co-drivers Lora “L. L. “ Corum and Joe Boyer win the Indianapolis 500 in a Duesenberg, the marque’s first victory of this race

Source: Automobile History Day By Day, by Douglas A. Wick