The Greek Volunteer Guard (Serbian Cyrillic: Грчка Добровољачка Гарда, Greek: Ελληνική Εθελοντική Φρουρά) was a unit of Greek volunteers that fought in the Bosnian War on the side of the Army of the Republika Srpska. Some members of the unit are alleged to have been present in the area of the Srebrenica Massacre and reportedly hoisted a Greek flag over the town on Ratko Mladić's instigation.
The first detachment of Greek volunteers in Bosnia arrived in 1993. In March 1995, the Greek Volunteer Guard (ΕΕΦ), a contingent of one hundred Greek paramilitaries formed at the request of the Chief of Staff of the Bosnian Serb Army Ratko Mladić, became a regular fighting unit of the Drina Corps with its own insignia, a white double-headed eagle on a black background. The unit, led by Serb officers, was based in Vlasenica, a town in the Drina Valley.
Some of the volunteers allegedly had links with Golden Dawn (Χρυσή Αυγή), a Greek nationalist political party accused as being neo-nazi by their opponents, while others were mercenaries. They were allegedly motivated to support their Orthodox brothers in battle.
Archbishop Seraphim of Athens had invited Bosnian Serb leader Radovan Karadžić to visit Athens in 1993. At a rally attended by some Greek politicians, Karadžić proclaimed: "We have only God and the Greeks on our side."