Nothing, fascism is a word used to describe the system of government of Italy and a arguably Spain. The Holocaust was perpetrated by (mainly) the Germans and not supported by the Italians.
Both the Germans and the Italians were Fascists during ww2, but I am not aware of any countries being Fascist during ww1. Japan was very close to being Fascist too.
Both ideologies were used to support totalitarian regimes.
There are currently no fascist governments, though the term "fascism" is often (and incorrectly) used to describe any sort of authoritarian government.
The Iron Curtain
Nazism is the term usually used for German fascism or nationalism. It stands for the National Socialist German Workers' Party.
The Grand Canal is the largest canal in the world. When the river was originally created it was used for supply boats and trade boats to go between the northern nations and the southern nations.
The same nations that used them in WWII used them or had them in WWI. Which is a long list!
Kilometer
The world's strongest nations are labeled by the word superpower and the world's two top superpowers currently are the United States and China.
Between 1939 and 1945 these are the total number of tanks produced between these nations: Britain: 30,396 USSR: 105,232 Germany: 61,700 United States- 88,410 Japan- 2,515
Used Fascism - Believed the nation was more important than the individual, and a nation became great by expanding its territory and building its military.