WHAT ALL HAPPENED MAY TO JUNE 1915
Find out what all happened May to June 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 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)

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

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

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

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

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