Many things actually. The Germans might still have a monarchy, the Russians might not have turned to communism, many empires would still be around in some form, Adolf Hitler wouldn't have to see his beloved Germany in a wretched state due to the Treaty of Versailles, the world would not have seen the concepts of modern warfare for a few more decades, and various writers, such as Ernest Hemingway, would not be famous. Despite the lack of attention it gets, it was an essential part of the 20th century and creating the world as we know it.
World War 2 started.
Easy, think about it - without World War 1, World War 2 would never have happened...! Therefore, WW1's contribution to history was WW2...!
Nothing
They took the fish
ugly prejudiced
If world war one had not happened then I don't think that world war two would have happened. Sometimes you have to ask yourself: What did it achieve? If you can't come up with an good answer then there was almost no point in the world war one. If world war one had not happened then there would probably not have been a world war two!
World War 1 happened first and World War 2 happened second.
World war 1 ended
World War 2 started.
Yes, after WWII imperialism wasn't allowed
a war
There were two world wars. World War 1, aka the Great War, happened from 1914 to 1918. World War 2 happened from 1939 to 1945.
it was in afraid of war after world war 1
world war2
what happened in the early weeks of the war
The Holocaust would have never happened.
World War 1 World War 2 Is that enough?