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.
Serbia
Serbia
Austria-Hungary on Serbia.
The 1st country to declare war on Serbia was Austria-Hungary.
an act of terrorism
austria declared war on Serbia in 1914
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.