| Date | Event |
|---|---|
| May 01 1915 | RMS Lusitania Torpedoed. 1,198 Lives Loss |
| May 03 1915 | In Flanders Fields Written By John McCrae |
| May 07 1915 | RMS Lusitania Sunk |
| May 07 1915 | Japanese 21 Demands Ultimatum To China |
| May 09 1915 | Gemany, France Engage In Battle Of Artois |
| May 17 1915 | Asquith's British Liberal Party Falls |
| May 22 1915 | Lassen Peak Volcano Erupts In U.S |
| May 22 1915 | Fatal Collision Of Three Trains In Scotland |
| May 23 1915 | Italy Joins World War 1 Allies |
| May 24 1915 | WWI: Italy Declares War On Austria-Hungary |