First Serbian Volunteer Division

The First Serbian Volunteer Division (Serbian: Srpski dobrovoljački korpus) or First Serbian Division, was a military formation of the First World War, created by Serbian Prime Minister Nikola Pašić, and organised in the city of Odessa in early 1916. This independent volunteer unit was primarily made up of South Slav Habsburg prisoners of war, detained in Russia, who had requested to fight alongside the Serbian Army.

Source: Wikipedia — First Serbian Volunteer Division (CC BY-SA 4.0)