The 1st country to declare war on Serbia was Austria-Hungary.
Serbia was in WWI because Austria-Hungary declared war on them.
Serbia Serbia
Austria-hungary attacked Serbia
Austria-Hungary declared war on Serbia at the start of World War I.
Serbia kid kill a Prince of Austria so king of Austria really angry and Wage a war against Serbia and German Help austria and German attack England.England wages a war to German Empire.Then France join The England And this was Born of Allied.Then Ottoman Attack Russia.And Russia Go to Rumble with German Empire.AND WORLD WAR 1 IS START!
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
in world war world war 1 austria Hungary waged war on little Serbia but Serbia called its ally large russia then austria Hungary called its ally Germany, but Germany went to attack France which had allied itself to England, and belgium and to America, in world war 2 it was almost completely the same except for austria Hungary was taken over by Germany, Italy kept swaping sides and Algeria was fighting with the allies.
it caused Serbia to declare war on Austria Hungary
it caused Serbia to declare war on austria hungary