World War I started 100 years ago. It was supposed to be the war to end all wars. It lasted about four years. Lots of countries declared war on each other. Millions of people died from combat, disease, genocide and ethnic cleansing, and other causes. Undoubtedly non-human animals suffered horribly too.
See http://en.wikipedia.org/wiki/World_War_I.
Digital archives from a Canadian perspective may be found at:
http://www.cbc.ca/archives/categories/war-conflict/first-world-war/the-first-world-war-canada-remembers/topic---the-first-world-war-canada-remembers.html
Peace.
