WHAT ALL HAPPENED JANUARY TO MAY 1915
Find out what all happened January to May 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)

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

World War I: Second Battle of Artois between German and French forces. (9. May 1915)

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

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

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)

Typhoid Mary, the first healthy carrier of disease ever identified in the United States, is put in quarantine, where she would remain for the rest of her life. (27. March 1915)

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

The Rocky Mountain National Park is established by an act of the U.S. Congress. (26. 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)

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)

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)

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)

Japan issues the "Twenty-One Demands" to the Republic of China in a bid to increase its power in East Asia. (18. January 1915)

World War I: Massive naval attack in Battle of Gallipoli. Three battleships were sunk during a failed British and French naval attack on the Dardanelles. (18. March 1915)

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

World War I: German zeppelins bomb the towns of Great Yarmouth and King's Lynn in the United Kingdom killing more than 20, in the first major aerial bombardment of a civilian target. (19. January 1915)

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

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