Final answer:
The hashtags for each leader are #FascistItaly, #NaziGermany, and #CommunistSovietUnion.
Step-by-step explanation:
Fascist Italy refers to the period in Italian history when the country was under the rule of Benito Mussolini's National Fascist Party. This era lasted from 1922, when Mussolini came to power, until 1943, when Italy's alliance with Nazi Germany began to collapse during World War II.
Fascist Italy can be represented with the hashtag #FascistItaly. Nazi Germany can be represented with the hashtag #NaziGermany. Communist Soviet Union can be represented with the hashtag #CommunistSovietUnion.