- Allies land troops at the northern Greek city of Salonika; Greece is nominally neutral but allows the landing
- Bulgaria enters World War I as one of the Central Powers.
Detroit Tigers speedster Ty Cobb steals his 96th base of the season in 5-0 loss to Cleveland Indians; stands as MLB record until 1962 (Maury Wills, 104)
- Jose Maria Usandizaga, composer, dies at 28
- Otto Valdemar Malling, Danish organist and composer (Det hellige Land, opus 46), dies at 67