Yeah, it was part of Yugoslavia at the time
Austria-Hungary and Serbia.
All countries involved in World War 1 had huge debt following the war. Te exact amount that Serbia borrowed is unknown, but debt was something that all nations involved had to deal with and it was worked out in the Treaty of Versailles.
Serbia was in WWI because Austria-Hungary declared war on them.
Serbia Serbia
Serbia
Serbia
Austria-hungary attacked Serbia
Yes. Bulgaria joined the Central Powers to fight Serbia.
Germany was the first country to declare war on Serbia in World War 1. The other countries were pulled into the war because the had alliances with either Serbia or Germany.
The 1st country to declare war on Serbia was Austria-Hungary.
Serbia
some countries supported Austria-Hungary (like Germany...) and some supported Serbia (like Russia...) and then World War I started...