Alsace-Lorraine
Absolutely not!
Yes, it is true Russia joined WW1 because of a previous agreements to protect Serbia
serbia
Serbia i think
Serbia
Serbia and austria-Hungary
Allies ... use wikipedia for more information.
Russia helped Serbia when Serbia had rebelled
Yes. After the years of the death of Tito, it began to collapse and formed into Serbia and Montenegro. By 2006, it had formed into two different countries: Serbia, and Montenegro.
Austria-Hungary declares war on Serbia.
Russia wanted to protect the Slavic peoples of Serbia