 Corfu served as a refuge for the Serbian army that retreated there by the Entente forces ships from the homeland occupied by the Austrians and Bulgarians.During their stay, a large portion of Serbian soldiers died from exhaustion, food shortage, and different diseases.Most of their remains were buried at sea near the island of Vido, a small island at the mouth of Corfu port, and a monument of thanks to the Greek Nation has been erected at Vido by the grateful Serbs; consequently, the waters around Vido island are known by the Serbian people as the Blue Graveyard (in Serbian, Плава Гробница), after a poem written by Milutin Bojić after World War I.