WHAT ALL HAPPENED JANUARY TO DECEMBER 1915
Find out what all happened January to December 1915

Richard Strauss conducts the first performance of his tone poem Eine Alpensinfonie in Berlin. (28. October 1915)

William Jennings Bryan resigns as Woodrow Wilson's Secretary of State over a disagreement regarding the United States' handling of the sinking of the RMS Lusitania. (9. June 1915)

The Rocky Mountain National Park is formed by an act of U.S. Congress. (12. January 1915)

Lassen Peak erupts with a powerful force, and is the only mountain other than Mount St. Helens to erupt in the contiguous US during the 20th century. (22. May 1915)

Bulgaria enters World War I as one of the Central Powers. (5. October 1915)

Japanese 21 Demands Ultimatum to China (Commemorated as National Day of Humiliation) (7. May 1915)

D.W. Griffith's controversial film The Birth of a Nation premieres in Los Angeles. (8. February 1915)

World War I: Cornered off the coast of Chile by the Royal Navy after fleeing the Battle of the Falkland Islands, the German light cruiser SMS Dresden is abandoned and scuttled by her crew. (14. March 1915)

World War I: Italy joins the Allies after they declare war on Austria-Hungary. (23. May 1915)

An earthquake in Avezzano, Italy kills 29,800. (13. January 1915)

Georges Claude patents the neon discharge tube for use in advertising. (19. January 1915)

Jewish American Leo Frank is lynched for the alleged murder of a 13-year-old girl in Marietta, Georgia, United States. (17. August 1915)

NACA, the predecessor of NASA, is founded. (3. March 1915)

Lieutenant Kurt Wintgens achieves the first known aerial victory with a synchronized machine-gun armed fighter plane, the Fokker M.5K/MG Eindecker. (1. July 1915)

World War I: The Kingdom of Bulgaria joins the Central Powers. (14. October 1915)

Parris Island is officially designated a United States Marine Corps Recruit Depot. (1. November 1915)

Over 600 people are killed in Guadalajara, Mexico, when a train plunges off the tracks into a deep canyon. (22. January 1915)

World War I: The German 12th Army occupies Warsaw during the Gorlice–Tarnów Offensive and the Great Retreat of 1915. (4. August 1915)

First Order of the Arrow ceremony takes place and the Order of the Arrow is founded. (16. July 1915)

RFC Captain Lanoe Hawker becomes the first British military aviator to earn the Victoria Cross, for defeating three German two-seat observation aircraft in one day, over the Western Front. (25. July 1915)