After archduke Ferdinand was assassinated, Austria Hungary declared war on Serbia. Russia then came to Serbia's aid because of an alliance and declared war on Austria Hungary. Germany declared war on Russia because of its alliance with Austria Hungary. Britain declared war on Germany because of its alliance with Russia. Other countries such as France and the Ottoman Empire soon chose sides and World War 1 began
They had an alliance with Serbia.when gravilio princip, Serbian nationalist assassinated franz Ferdinand Austria Hungary declared war on Serbia, so Russia declared war on Austria Hungary due to the alliance. They got out of the war by giving Germany some land because they were getting whooped, they sued for peace.
After the Austro-Hungary monarchy declared war on Serbia, France and Russia who were protecting Serbia declared war on Austria-Hungary. and then Germany declared war on Russia and France, then UK declared war on Germany...
Austria-Hungary declared war on serbia and Germany joined because it was allied with austria.
Because of its alliance with Austria-Hungary. Yeah that might be correct!
When Russia started fighting against Germany, Russia's allies (Norway,Austro-Hungarian and England all stepped in to help one by one. Then Russia's allies (America and Switzerland stepped in, leading to the GREAT WAR.
Serbia was in WWI because Austria-Hungary declared war on them.
Mobilized its military because of its alliance with Serbia.
Archduke Ferdinand and his wife were assassinated by Serb separatists. Austria-Hungary sent them an ultimatum, the result of which drew Russia into the situation, because Russia was the self appointed defender of the Slavs. When war was declared between the two, France was forced in due to its alliance with Russia, and Germany was forced in due to its alliance with Austria-Hungary. Finally, England declared war on Germany for declaring war on Belgium.
It was a World War because a man killed the archduke of Austria-Hungary in Sebia. Austria-Hungary declared war on Serbia. Serbia had an alliance with Russia and then Russia joined the war. Russia was in the Triple Entante and pulled Britain and France into the war. Austria-Hungary had alliances with Germany and the Ottoman Empire. They also joined the war. That is why World War I was a world war.
US declared war on Germany because of the U-Boats attacking vessels. The Central Powers such as Germany, Austria-Hungary, and the Ottoman Empire declared war on the Allied Powers such as Great Britain, France, Russia, Italy, and Japan. While that was going on the the Triple Alliance such as Argentina, Brazil, and Uruguay were in war with the Triple Entente such as France, Russia, and Great Britain.
Austria-Hungary was part of the triple alliance along with Germany, Italy and the Turkish Empire. This alliance was against the Triple Entente which consisted of France, Great Britain and Russia although Russia later pulled out because of it's revolution later replaced by America in 1917.