On 28th June 1914 Archduke Francis Ferdinand, heir to the Austro-Hungarian throne, was assassinated in Sarajevo by a Serbian nationalist (Gavrilo Princip). Convinced that the Serbian government had conspired against them, Austria-Hungary issued Serbia an unacceptable ultimatum. Serbia actually tried to comply, but falling short of the mark set by the Austro-Hungarians, this was seen as legitimate causus belli. This resulted in Austria-Hungary declaring war on Serbia on 28th July 1914.
The Austro-Hungarians invaded Serbia, because 6 Serbian men planned to kill the archduke Franz Ferdinand, and one man named Gavrilo Princip succeeded after the archduke's driver took a wrong turn to hospital. Gavrilo also killed the archduke's wife Sophia (Duchess)
Austria-Hungary declared war on Serbia because they had just taken over Bosnia but people there considered themselves as Serbs and wanted Bosnia to be part of Serbia. A member from a Serbian group called the Black Hand group assassinated Austria's next in line to the throne Archduke Franz Ferdinand in Sarajevo. Austria blamed Serbia for this so sent them an ultimatum. The Serbian government couldn't fulfill all the demands so Austria declared war on Serbia.">Austria-Hungary declared war on Serbia because they had just taken over Bosnia but people there considered themselves as Serbs and wanted Bosnia to be part of Serbia. A member from a Serbian group called the Black Hand group assassinated Austria's next in line to the throne Archduke Franz Ferdinand in Sarajevo. Austria blamed Serbia for this so sent them an ultimatum. The Serbian government couldn't fulfill all the demands so Austria declared war on Serbia.
Austria-Hungary declared war on Serbia as a response to the assassination of Arch Duke Franz Ferdinand by Gabrillo Princip. Austria-Hungary wanted revenge and with the backing of Germany they sent Serbia an ultimatum. They made the terms unnacceptable, and when Serbia could not meet all the terms Austria-Hungary declared war.
Austria-Hungary did not exist in 1941; it was dissolved just before World War I ended in 1918. It split into many smaller countries, including Austria, Hungary, Czechoslovakia (which is now Czech Republic and Slovakia), and Yugoslavia.
Perhaps you mean 1914. In June 1914, the heir to the Austro-Hungarian throne was murdered in Sarajevo by some Bosnians. Bosnia was ruled by Austria at the time, and many Bosnians wanted that to end; some Serbs did too, hoping that a free Bosnia would join Serbia to create a larger and more powerful country. The Bosnians who murdered the heir were assisted by some Serbian military and intelligence officers, and the Austrian government knew this. After the assassination, Austria's government gave Serbia a list of demands and said they would declare war if Serbia did not accept. Serbia accepted all but one (which they constitutionally were forbidden from accepting), so Austria declared war.
Beacause of on 28th June 1914 Archduke Francis Ferdinand, heir to the Austria-Hungarian throne, was assassinated in Sarajevo, by a Serbian nationalist. Convinced that the Serbian government had conspired against them, Austria-Hungary issued Serbia an unacceptable ultimatum, then they declared the war on Serbia on 28th July 1914.
Austria declared war on Serbia because they were afraid of the Serbs joining Serbia so they were looking for an excuse to crush Serbia.
Serbia
Serbia
Austria-Hungary on Serbia.
The 1st country to declare war on Serbia was Austria-Hungary.
austria declared war on Serbia in 1914
an act of terrorism
Serbia
it caused Serbia to declare war on Austria Hungary
it caused Serbia to declare war on austria hungary
1941
July 28, 1914
The assassination of Austrian Archduke Ferdinand was the immediate cause of World War I. He was killed by a Serbian terrorist, which caused Austria to declare war on Serbia. Serbia was allied with Russia, who intervened, causing Germany to declare war on Russia, which caused France to declare war on Germany.