Ohrana
Ohrana (Bulgarian: Охрана, "Protection"; Greek: Οχράνα) were armed collaborationist detachments organized by the former Internal Macedonian Revolutionary Organization (IMRO) structures, composed of Bulgarians in Nazi-occupied Greek Macedonia during World War II and led by officers of the Bulgarian Army. Bulgaria was interested in acquiring Thessalonica and Western Macedonia, under Italian and German occupation and hoped to sway the allegiance of the 80,000 Slavs who lived there at the time.