During World War I, Austria-Hungary's primary enemies were the Allied Powers, which included countries like Serbia, Russia, France, and the United Kingdom. The conflict began after the assassination of Archduke Franz Ferdinand of Austria, which led to Austria-Hungary declaring war on Serbia. This action triggered a series of alliances and escalated the war, ultimately involving numerous nations across Europe and beyond.
The 1st country to declare war on Serbia was Austria-Hungary.
Serbia Serbia
Serbia was in WWI because Austria-Hungary declared war on them.
Austria-hungary attacked Serbia
Austria-Hungary declared war on Serbia at the start of World War I.
Serbia partially accepted the ultimatum from Austria-Hungary but rejected some of the demands. This led to Austria-Hungary declaring war on Serbia, which ultimately sparked the beginning of World War I.
World War One was started when Serbia killed Archduke Francis Ferdidnand and his wife Sophia of Austria-Hungary. Serbia and Austria-Hungary were already at odds for a while but when the Archduke was killed Austria-Hungary called a state of war on Serbia.
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.
Serbia
Austria-Hungary did not directly give anything to Serbia during World War I; rather, the conflict was sparked by tensions between the two nations. The assassination of Archduke Franz Ferdinand of Austria in June 1914 by a Bosnian Serb nationalist led Austria-Hungary to issue an ultimatum to Serbia. When Serbia's response was deemed unsatisfactory, Austria-Hungary declared war on Serbia, initiating the larger conflict of World War I.
it caused Serbia to declare war on austria hungary