WHAT ALL HAPPENED MAY TO DECEMBER 1915
Find out what all happened May to December 1915

The RMS Lusitania departs from New York City on her two hundred and second, and final, crossing of the North Atlantic. Six days later, the ship is torpedoed off the coast of Ireland with the loss of 1,198 lives, including 128 Americans, rousing American sentiment against Germany. (1. May 1915)

World War I: Battle of Sari Bair – the Allies mount a diversionary attack timed to coincide with a major Allied landing of reinforcements at Suvla Bay. (6. August 1915)

World War I: British nurse Edith Cavell is executed by a German firing squad for helping Allied soldiers escape from Belgium (12. October 1915)

The U.S. Supreme Court hands down its decision in Guinn v. United States 238 US 347 1915, striking down an Oklahoma law denying the right to vote to some citizens. (21. June 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)

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

A story in New York World reveals that the Weimar German government had purchased excess phenol from Thomas Edison that could be used to make explosives for the war effort and diverted it to Bayer for aspirin production. (15. August 1915)

The pacifist Zimmerwald Conference begins. (5. September 1915)

World War I: end of First Battle of the Isonzo. (7. July 1915)

Three trains collide in the Quintinshill rail disaster near Gretna Green, Scotland, killing 227 people and injuring 246; the accident is found to be the result of non-standard operating practices during a shift change at a busy junction. (22. May 1915)

Woman's suffrage: In New York City, 25,000-33,000 women march on Fifth Avenue to advocate their right to vote. (23. October 1915)

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

Henry James becomes a British citizen, to highlight his commitment to England during the first World War. (16. July 1915)

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

Foundation of the British Women's Institute. (16. June 1915)

The Battle for the Hohenzollern Redoubt marks the end of the Battle of Loos in northern France, World War I. (13. October 1915)

A Category 4 hurricane hits Galveston, Texas with winds at 135 miles per hour (217 km/h). (17. August 1915)

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