Answer: Russia mobilized along the German border. Russia's mobilization amounted to a declaration of war. On August 1, German government declare war on Russia.
SERBIA
some guy from austria-hungary assassinated archbishop Ferdinand of Serbia. Serbia were allies of Russia and then Russia declared war on austria-hungary
Mutual Defense Alliances. Imperialism.Militarism. Nationalism and I dunno the other.
The first declaration of war was on July 28th, 1914, when Austria-Hungary declared war on Serbia.
France and Great Britain allied with Serbian during World War 1. Serbia was the first country to be attacked in World War 1.
Austria-Hungary declared war on Serbia then with Germanys backing attacked France & England ... in a nutshell
Serbia assassinated arch duke Ferdinand Austria attacked Serbia Russia attacked Austria because they were allied to Serbia Germany attacked Russia because Germany was allied to Austria France and England were allies of Russia, so Germany attacked France France was then in war with Germany
they were only defending their ally, Austria Hungary, which was attacked by Serbia
Serbia Serbia
If you mean how did alliances cause WWI, it was because when one country attacked another, each ally had to fight for the first, which made more people angry Serbia provoked Austria Austria attacked Serbia Russia was allied to Serbia, so they attacked Austria Germany was allied to Austria so they attacked Russia's allies, France and England
Gavrilo Princep of Serbia attacked the archduke of Austri-Hungry, Franz Ferdinand which ticked of Austria and they attacked Serbian. Then all the allicances came in.
Serbia
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The 1st country to declare war on Serbia was Austria-Hungary.
Serbia was accused for the assassination of Archduke Franz Ferdinand (Austro-Hungarian future king) in Sarajevo in 1914 by Gavrilo Princip (he was a member of the Serbian nationalist group the Black Hand). So it didn't desire anything. Serbia was attacked.