More land.
After WW1 germany, Italy, and Japan had dictators. Germanys was HITLER:(
Because they were bored and wanted something to do. Also, I never knew Japan entered WWI.
Japan
Its empire, the Russian empire, Canada, Italy, the Empire of Japan, Portugal, USA and France.
Well obviously enough, Germany lost WW1, and was blamed for starting it. They had to pay 30 billion $ to help the Triple Entente(Britain, US, France), they also had to weaken their territory and military. They were punished by the "Treaty of Versailles." Italy DID NOT get any land or benefit from the Treaty of Versailles...and that is one of the common reasons people believe why Germany and Italy were mad after WW1. I am not sure about Japan..but I know more that Japan was more involved in WW2 than WW1.
Canada was one of the main Allies in both WW2 and WW1.
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Italy...Austria...Hungary...Japan (yes, Japan) - WW2 Austrian-Hungarian (Hapsburg) Empire, Ottoman Empire (Turkey) - WW1
Britain, France, Russia & the US are common to the Allies in both WW1 & WW2. They are opposed by Germany in both wars. In WW1 Italy & Japan were both on the side of the Allies, in WW2 they were on Germanys' side. Turkey was on the side of Germany in WW1 & Neutral in WW2. Austria/Hungary was on the side of Germany in WW1 & were also on Germanys' side in WW2, (although it might be said by force rather than choice.) although they were then 2 separate countries.
WW1 contributed to the rise of fascism in both Italy and Germany and to the rise of totalitarianism in the Soviet Union.
Fascism existed in Italy in the period of WW1. As a matter of fact, this appears to have fuelled Italy's participation in the war.
WW1: Austria-Hungary, Ottoman Empire, Bulgaria WW2: Austria (Anschluss), Japan, temporarily Russia & Italy