Austria-Hungary didn't join the war, they were basically the ones who started it as well as Serbia. On June 28, 1914, Archduke Franz Ferdinand, heir to throne of the Austrian-Hungarian Empire and his wife are assassinated in Sarajevo, Serbia by a secret Serbian organization called the "Black Hand". 7 assassins were sent out to do the job. Austria-Hungary immediately calls war against Serbia, who has an alliance with Russia etc.
She never surrender to Serbia alone, but surrendered to Allied powers including Serbia. Serbia at near end of the war occupied territory that will be known as Yugoslavia and some parts of Hungary and Austria.
11-4-1918
at the end
Austria Hungary did not become one nation after World War 1.
There was no Austria-Hungary after WWI it was broken up after the first world war
Austria-Hungary
Austria-Hungary fought in the Battle of Ginghames during World War One. This battle was between Austria-Hungary and Italy.
germany
Austria-Hungary
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.
Austria-Hungary.
Austria-Hungary
austria hungary
Hungary officially split from Austria-Hungary in October 1918, so Austria and Hungary had to negotiate separate treaties. Austria had the Treaty of Saint-Germain, and Hungary had the Treaty of Trianon.
Joseph Ferdinand