WHAT ALL HAPPENED APRIL TO OCTOBER 1915
Find out what all happened April to October 1915

The use of poison gas in World War I escalates when chlorine gas is released as a chemical weapon in the Second Battle of Ypres. (22. April 1915)

Militia officer Henry Pedris executed by firing squad at Colombo, Ceylon - an act widely regarded as a miscarriage of justice by the British colonial authorities. (7. July 1915)

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

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

The last British Liberal Party government (led by Herbert Henry Asquith) falls. (17. May 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 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)

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

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

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

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

Denmark amends its constitution to allow women's suffrage. (5. June 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)

An International Railway trolley with an extreme overload of 157 passengers crashes near Queenston, Ontario, killing 15. (7. July 1915)

World War I: The Second Battle of Champagne begins. (25. September 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)

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

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

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

World War I: The Battle of Gallipoli begins—The invasion of the Turkish Gallipoli Peninsula by Australian, British, French and New Zealand troops begins with landings at Anzac Cove and Cape Helles. (25. April 1915)