The Great War lasted four years and it included Italy, Japan, the United States, the Middle East and other countries.
The Great War and Its Impact
Over 20 million people died, over 21 million wounded, and millions of others became victims to the influenza epidemic that spread due to the war.
After the war, the imperial dynasties of Germany, Austria-Hungary and Turkey were ruined, so the rule of their empire's were not as big and powerful compared to other countries as they were before the war.
At the very end, the peace deal that was made at Versailles in 1919 kept tensions at a low for under two decades before another deadly world war broke out.