- British ocean-liner Lusitania sunk by German submarine, 1,195 perish.
- The one millionth Ford automobile rolls off the assembly line.
- D.W. Griffith's The Birth of a Nation, is released.
- The Rocky Mountain National Park is established by an act of the U.S. Congress.
- U.S. Congress designates the United States Coast Guard, begun in 1790, as a military branch.
- John B. Gruelle is given a patent for his Raggedy Ann doll.
Historical Highlights from 1915