Austria-Hungary, Mentenegro, and Serbia
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.
Austria-Hungary's future king was assassinated.
Serbia
Austria-Hungary
Serbia
they promised to support Austria-Hungary after it threatened to invade Serbia
Germany guaranteed Austria-Hungary its support in the conflict with Serbia.
Answer this question… Russia had an alliance with Serbia, and Germany had an alliance with Austria-Hungary.
they promised to support Austria-Hungary after it threatened to invade 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.
Austria-Hungary feared Serbia because of the growing size of Serbia and because of Serbia existing as a free national state Hope this helps!