July 28th, 1914.
The assassination of Archduke Franz Ferdinand of Austria in Sarajevo led Austria-Hungary to declare was on Serbia. This was to effectively be the beginning of World War I.
an act of terrorism
Serbia
it caused Serbia to declare war on Austria Hungary
it caused Serbia to declare war on austria hungary
The 1st country to declare war on Serbia was Austria-Hungary.
The archduke of Austrohungary Franz Ferdinand was assassinated in Serbia. The Serbians arrested the assasin and Austrohungary asked Serbia to deport him. The Serbians refused, so Austrohungary invaded Serbia and another country got involved and another and so on until it finished up a world war.
July 28, 1914
Germany was the first country to declare war on Serbia in World War 1. The other countries were pulled into the war because the had alliances with either Serbia or Germany.
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.
because the assaination of Franz ferdinand who was the prince of austo hungary at the time caused so much tensions between the austohungary and serbia. The both made alllies. One side was the central powers with austrohungary italy ottoman empire and germany. The allied powers where france england russia serbia belgium
On June 28, 1914, the heir to the throne of Austria-Hungary, Archduke Franz Ferdinand, was assassinated in Sarajevo (occupied Serbia) by separatist revolutionaries including Gavrilo Princip. This event precipitated a declaration of war by Austria-Hungary, and the beginning of World War 1.