WHAT ALL HAPPENED JANUARY TO SEPTEMBER 1915
Find out what all happened January to September 1915

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

Ice Hockey: The Vancouver Millionaires sweep the Ottawa Senators three-games-to-none to win the 1915 Stanley Cup Finals, the first championship played between the Pacific Coast Hockey Association and the National Hockey Association. (26. March 1915)

Denmark amends its constitution to allow women's suffrage. (5. June 1915)

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

French pilot Roland Garros is shot down and glides to a landing on the German side of the lines during World War I. (18. April 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)

The last British Liberal Party government (led by Herbert Henry Asquith) falls. (17. May 1915)

World War I: Italy declares war on Austria-Hungary. (24. May 1915)

An act of the U.S. Congress creates the United States Coast Guard as a branch of the United States Armed Forces. (28. January 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)

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)

The United States House of Representatives rejects a proposal to give women the right to vote. (12. January 1915)

World War I: Germany is the first to make large-scale use of poison gas in warfare in the Battle of Bolimów against Russia. (31. January 1915)

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

World War I: German submarine U-20 sinks RMS Lusitania, killing 1,198 people including 128 Americans. Public reaction to the sinking turns many formerly pro-Germans in the United States against the German Empire (7. May 1915)

World War I: The first naval attack on the Dardanelles begins when a strong Anglo-French task force bombards Ottoman artillery along the coast of Gallipoli. (19. February 1915)

The arrest of 250 Armenian intellectuals and community leaders in Istanbul marks the beginning of the Armenian Genocide. (24. April 1915)

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

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