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...
Austro-Hungary was ruled by an Emperor from the Habsburg family in 1914.
He created a compromise to give equal status to Austria and Hungary.
Hungary officially split from Austria-Hungary in October 1918, so Austria and Hungary had to negotiate separate treaties. Austria had the Treaty of Saint-Germain, and Hungary had the Treaty of Trianon.
Germany, Austria-Hungary, and Italy
Until his death, Franz Joseph I of Austria was the leader of the Austro Hungarian Empire during World War I. After he died, his nephew Charles I of Austria took over.
Francis Joseph
An archduchess is a daughter or granddaughter of the Emperor of Austria-Hungary or the wife of a son or grandson of the Empire of Austria-Hungary.
Emperor Franz Josef I
Emperor Karl was born on August 17, 1887, in Castle of Persenbeug, Lower Austria, Austria-Hungary.
Emperor Franz Josef died on November 21, 1916, in Vienna, Austria-Hungary [now Austria].
Emperor of Austria and King of Hungary
Austria-Hungary. Oesterreich is the German name for Austria. Kaiser und Koenig is German for Emperor and King. When Austria and Hungary were united under a single ruler, he held the titles of Emperor of Austria and King of Hungary, so they often put Kaiser und Koenig on their stamps, or an abbreviation such as KuK.
Austro-Hungary was ruled by an Emperor from the Habsburg family in 1914.
Franz Josef I was Emperor of Austria/ king of Hungary, when Austria entered WW1. The last emperor was Charles I of Austria (also written Karl I of Austria) who ascended the throne when Franz Josef died in 1916. He abdicated Nov 11 1918 and died in exile. By the time of the Anschluss in 1938, there had been no emperor for 20 years.
Franz Ferdinand
He created a compromise to give equal status to Austria and Hungary.
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.