Austria-Hungary on Serbia.
The 1st country to declare war on Serbia was Austria-Hungary.
Serbia
Germany guaranteed Austria-Hungary its support in the conflict with Serbia.
they promised to support Austria-Hungary after it threatened to invade Serbia
they promised to support Austria-Hungary after it threatened to invade Serbia
it caused Serbia to declare war on austria hungary
it caused Serbia to declare war on Austria Hungary
some guy from austria-hungary assassinated archbishop Ferdinand of Serbia. Serbia were allies of Russia and then Russia declared war on austria-hungary
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.
Franz Ferdinand
The kaiser's support of Austria-Hungary led that nation to declare war on Serbia-novanet