(Admiral) Miklos Horthy (1868-1957) was nominally the Regent of Hungary from 1920-44, and for most purposes the dictator. In 1944 he was kidnapped by the SS and taken to Bavaria because he tried to negotiate a separate peace with the Soviet Union. The 100% Nazi 'Arrow' Party then seized power and continued fighting. Hungary was an Axis country and therefore on the German side.
I am a Hungarian doing a PhD in Texas that focuses on Hungarian Tourism, past and present, which is why I feel qualified to answer this question. Technically, it was a democracy. Although, it is important to understand that while the technical definition of democracy has not changed over time they way in which democracies function has altered. Prior to and during World War 2 there was a Prime Minister, there were elections, there were parties, and there was a Parliament. None the less, Behind the Scenes it functioned as an Oligarchy - although this is my take and not necessarily agreed upon by historians. Hungary was in a Depression in the late '30s and the elite few controlled the money, thus had the power, and made and broke Prime Ministers and politicians on many occasions. By today's standards it was somewhere between an oligarchy and a democracy because the people still had a voice. Hope that helps!
If you're talking about Austria-Hungary and the one whose death started World War I, that would be Archduke Franz Ferdinand. During World War II, considering that it started in 1939, Austria was already a part of Nazi Germany, making Hitler the leader of Austria (and all other German countries excluding Switzerland and Liechtenstein). Not sure who was in charge of Hungary during this time...
Vladimir Lenin was the Russian revolutionary leader at the end of World War 1.
Emperor Hirohito.
Fransico Franco was the leader of Spain during World War 2.
Stalin
I believe you are asking what started World War I and that would be the assassination of the Austria-Hungary leader
There was no Austria-Hungary after WWI it was broken up after the first world war
Joseph Ferdinand
No. That was World War 1
Bosnia wasn't an independent nation during the First World War, it was owned by Austria-Hungary at the time, the Emperor-King of Austria-Hungary was Franz-Joseph I until his death in 1916 and Charles I from 1916 until the dissolution of Austria-Hungary in 1918.
Franz Joseph I was emperor for two years into the war -after his death in 1916 his grandnephew, Charles I took over.
Franz Ferdinand was killed by Gavrilo Princip in 1914, just before the war.
Joseph Stalin was the leader of the Soviet Union during World War II.
Hideki Tojo was the leader of japan in world war 2.
There was no single leader during WW1. Each country had their own leader.
Tsar Nicholas II was the leader of Tsarist Russia in World War 1.
Antonia Solandra was a leader in Italy during world war I. Antonia Solandra was a leader in Italy during world war I.