-
British officially declares war on Germany
-2 - Political Change -
Battle of Ypres
+1 - Economic Change -
Battle of Somme
-2 - Economic Change -
The Wartimes Election Act
+1 - Social Change -
The Versailles Treaty
+2 - Political Change -
Prohibition
0 - Social Change -
Discovery of Insulin
+2 - Social Change -
Halibut Treaty
+2 - Political Change -
Old Age Pension
+1 - Economic Change -
Great Depression Began
-2 - Economic Change
