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Austria-Hungary
A Serbian nationalist assassinated the Archduke Franz Ferdinand of Austria-Hungary in the Bosnia capital of Sarajevo. He murder both Franz and his wife Sofia. This event caused Austria-Hungary to declare war on Serbia.
Exactly one month. Franz Ferdinand was killed on the 28. of June on Serbian national holy day and on the 28. of July Austria - Hungary declared war on Serbia.
do you know when Britain declared war on Germany and austria-Hungary
Because Russia Invaded Austria.
Austria-Hungary on Serbia.
Austria-Hungary.
they promised to support Austria-Hungary after it threatened to invade Serbia
they promised to support Austria-Hungary after it threatened to invade Serbia
Germany guaranteed Austria-Hungary its support in the conflict with Serbia.
Archduke Ferdinand and his wife were assassinated by a Serbian Nationalist acting on his own. As a result, Austria-Hungary declared war on Serbia. Germany, with a military alliance with Austria-Hungary, backed them up militarily. This action forced Britain and France to declare war on Germany. The rest is history.
Serbia