The culture.
They are Slavics.
Russia helped Serbia when Serbia had rebelled
No, they are allies for ages.
the allies to Serbia are the Triple Entente, which included France, Russia and Great Britain...the Commonwealth, Italy, and America were also allies
Russia was Serbia's main ally during World War I. Russia had a powerful army and powerful allies as well.
They went to war with Russia since Russia wanted to help Serbia since they were allies.
Great Britain, France, Belgium, Russia. Russia backed Serbia. As Russia was allies with Britain and France through the triple entente, Serbia had their backing as well. Eventually, America and Belgium supported them too.
They invaded Bosnia who at the time were rather close allies of Serbia. This made Serbia angry and thus forth they contacted Russia who were allies with Serbia. Russia then said that if Austria-Hungary do anything to Serbia, Russia will have to react. Then after the assassination A-H shelled the capital of Serbia and that started the war.
They went to war with Russia since Russia wanted to help Serbia since they were allies.
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
Serbia, Russia, France, and Great Britain.
Russia, France, Great Britain, Italy, and Serbia