High Quality Content by WIKIPEDIA articles! Marburg`s Bloody Sunday (German: Marburger Blutsonntag,Slovene: Mariborska krvava nedelja) is the name of a massacre that took place on Monday, January 27, 1919 at Maribor (German: Marburg an der Drau) in Slovenia. Soldiers from the army of the Kingdom of Serbs, Croats and Slovenes (aka Yugoslavia), under the command of Slovene officer Rudolf Maister, killed between 9 and 13 civilians of German ethnic origin, wounding a further 60, during a protest in a city centre square. Estimates of casualties differ between Slovene and Austrian sources.