Massacre of Serbs by the Ustaše in Croatia during World War II
The Blagaj massacre was the mass killing of around 400 Serb civilians by the Croatian nationalist Ustaše movement on 9 May 1941, during World War II. The massacre occurred shortly after the German-led Axis invasion of Yugoslavia and the establishment of the Ustaše-led Axis puppet state known as the Independent State of Croatia (NDH). It was the second act of mass murder committed by the Ustaše upon coming to power and was part of a wider campaign of genocide against Serbs in the NDH that would last until the end of the war.
The victims were drawn from the village of Veljun and its surroundings, ostensibly for their involvement in the robbery and murder of a local Croat Catholic miller, Joso Mravunac, and his family. The Ustaše claimed that the murders were ethnically motivated and signalled the start of a regional Serb uprising. Following their arrests, the prisoners were detained in a Blagaj school, where many were beaten and tortured. The Ustaše intended to organize a mass trial of the men under the auspices of a "people's court". These plans fell apart after Mravunac's surviving daughter was unable to identify perpetrators from a police lineup and prosecutors declined to launch proceedings against any individual without evidence of their guilt. Dissatisfied, Vjekoslav Luburić, a senior Ustaše official, arranged for the creation of a new "special court" and appointed a prosecutor that was unwilling to let the lack of evidence hinder a conviction. The following day, the surviving Mravunac daughter allegedly identified one of the prisoners from a police lineup as being one of the perpetrators of the crime. This constituted sufficient reason to have 32 or 36 of the prisoners sentenced to death. The Ustaše went further and executed all of the men in their custody in a pit behind the Blagaj school, burying their bodies in a mass grave, which was subsequently covered with crops. 
Following the massacre, the female relatives of the victims visited Blagaj carrying baskets of food for the prisoners, but were told the men had been sent away to Germany. After three months, a local Ustaše official captured by the Partisans admitted that the prisoners had in fact been killed. Memories of the massacre fostered animosity between the residents of Blagaj and Veljun that have lasted for decades. During the 1991–1995 war in Croatia, fought amid the breakup of Yugoslavia, the residents of the two communities destroyed and plundered each other's villages, and forcibly displaced one another. The inhabitants of the two villages began returning to the region after the war, but tensions persisted, and an attempt to commemorate the massacre in May 1999 resulted in the socialist-era monument to the victims being desecrated. Annual commemorations have since resumed.
Background.
Inter-war period.
The Kingdom of Serbs, Croats and Slovenes was formed in the immediate aftermath of World War I. It was composed of six million Serbs, 3.5 million Croats and one million Slovenes, among others. Being the largest ethnic group, the Serbs favoured a centralized state. Croats, Slovenes and Bosnian Muslims did not. The so-called Vidovdan Constitution, approved on 28 June 1921 and based on the Serbian constitution of 1903, established the Kingdom as a parliamentary monarchy under the Serbian Karađorđević dynasty. Belgrade was chosen as the capital of the new state, assuring Serb and Orthodox Christian political dominance. In 1928, the prominent Croatian politician Stjepan Radić was shot and mortally wounded on the floor of the country's parliament by a Serb deputy. The following year, King Alexander instated a royal dictatorship and renamed the country Yugoslavia to deemphasize its ethnic makeup. It was divided into nine administrative units called banates (), six of which had ethnic Serb majorities. In 1931, Alexander issued a decree which allowed the Yugoslav Parliament to reconvene on the condition that only pro-Yugoslav parties be represented in it. Marginalized, far-right and far-left parties thrived. The Ustaše, a Croatian fascist movement, emerged as the most extreme of these. The Ustaše were driven by a profound hatred of Serbs. In 1932, they launched the Velebit uprising, attacking a police station in Lika. The police responded harshly to the attack and harassed the local population, leading to further animosity between Croats and Serbs. In 1934, an Ustaše-trained assassin killed Alexander while he was on a state visit to France. Alexander's cousin, Prince Paul, became regent and took up the king's responsibilities until Alexander's son Peter turned 18.
Following the 1938 "Anschluss" between Germany and Austria, Yugoslavia came to share its northwestern border with the Third Reich and fell under increasing pressure as her neighbours aligned themselves with the Axis powers. In April 1939, Italy opened a second frontier with Yugoslavia when it invaded and occupied neighbouring Albania. At the outbreak of World War II, the Yugoslav government declared its neutrality. Between September and November 1940, Hungary and Romania joined the Tripartite Pact, aligning themselves with the Axis, and Italy invaded Greece. From that time, Yugoslavia was almost completely surrounded by the Axis powers and their satellites, and her neutral stance toward the war became strained. In late February 1941, Bulgaria joined the Pact. The following day, German troops entered Bulgaria from Romania, closing the ring around Yugoslavia. Intending to secure his southern flank for the impending attack on the Soviet Union, Adolf Hitler began placing heavy pressure on Yugoslavia to join the Axis. On 25 March 1941, after some delay, the Yugoslav government conditionally signed the Pact. Two days later, a group of pro-Western, Serbian nationalist Royal Yugoslav Air Force officers deposed the country's regent, Prince Paul, in a bloodless coup d'état, placed his teenaged nephew Peter on the throne, and brought to power a "government of national unity" led by General Dušan Simović. The coup enraged Hitler, who immediately ordered the country's invasion, which commenced on 6 April 1941.
Creation of the NDH.
The Royal Yugoslav Army ("Vojska Kraljevine Jugoslavije", VKJ) was quickly overwhelmed by the combined German, Italian and Hungarian assault. Much of its equipment was obsolete, its military strategy was outdated and its soldiers were ill-disciplined and poorly trained. To make matters worse, many of the VKJ's non-Serb personnel, especially Croats, were reluctant to fight against the Germans, whom they considered liberators from decades of Serb oppression. On 10 April, senior Ustaše leader Slavko Kvaternik proclaimed the establishment of the Independent State of Croatia ("Nezavisna Država Hrvatska", NDH). The declaration came exactly one week before the VKJ's unconditional surrender to the Axis powers. The leader of the Ustaše, Ante Pavelić, was in Rome at the time and made arrangements to travel to Karlovac, just west of Zagreb. He arrived in Karlovac on 13 April, accompanied by several hundred of his followers. On 15 April, Pavelić reached Zagreb, having granted territorial cessions to Italy at Croatia's expense and promised the Germans that he had no intention of pursuing a foreign policy independent of Berlin. That same day, Germany and Italy extended diplomatic recognition to the NDH. Pavelić declared himself the "Poglavnik" ("leader") of the Ustaše-led Croatian state, which was to include much of present-day Croatia, all of present-day Bosnia and Herzegovina and parts of present-day Serbia. On 17 April, the Yugoslav Supreme Command capitulated to the Axis powers. The country was subsequently dismembered, and occupied by Germany and its allies.
Pavelić and his followers intended to create an "ethnically pure" Croatia through the mass murder and deportation of Serbs, Jews and other non-Croats. At the time, Croats only made up about 50 percent of the NDH's population of 6.5 million. Nearly two million Serbs, about one-third of the NDH's total population, now found themselves within the borders of the newly formed state. Serb-majority areas also covered between 60 and 70 percent of the NDH's total landmass. "The Croatian state cannot exist if 1.8 million Serbs are living in it and if we have a powerful Serbian state at our backs," Croatia's future Foreign Minister Mladen Lorković explained. "Therefore, we are trying to make the Serbs disappear from our regions." On 28 April, the Ustaše massacred nearly 200 Serb civilians in the village of Gudovac, their first act of mass murder upon coming to power.
Prelude.
Blagaj is a village in the Kordun region, about south of Karlovac. It is predominantly inhabited by ethnic Croats. On the evening of 5 May 1941, two unidentified men forced their way into the home of a local miller, a Catholic Croat named Joso Mravunac. They first robbed the family and then killed Mravunac, his wife, his mother and two of his children. Mravunac's 12-year-old daughter Milka escaped by jumping into a nearby river. The following day, investigative judge Nikola Lasić and county commissioner Eduard Lenčeric filed a report describing the incident as a "murder-robbery by unknown perpetrators". Local Ustaše officials dismissed these findings and suggested that the deaths could be attributed to "Chetniks" from the nearby village of Veljun, whose population was predominantly Serb. Dido Kvaternik, a senior Ustaše official, believed that the murders signalled the start of a Serb revolt. He immediately dispatched his subordinates Ivica Šarić and Vjekoslav Luburić to Blagaj. Šarić and Luburić led a contingent of about 50 Ustaše fighters, mostly returnees from Italy, into the village and its surroundings. Under Šarić and Luburić's supervision, the Ustaše rounded up nearly 400 Serbs.
On 6 May, NDH Justice Minister Mirko Puk requested that Vladimir Židovec, the secretary of the Karlovac Ustaše Council, select local lawyers deemed "certified good Croats" to prosecute Serbs suspected of involvement in the Mravunac murders. The arrested individuals were to be tried by a so-called "people's court" in Blagaj. That evening, Puk dispatched messengers from the Karlovac Ustaše Council, telling the lawyers he had selected that they should be ready to depart for Blagaj by 05:00 the following morning. Those selected included Mirko Mikac, president of the county courthouse, as president of the Special People's Court; Ivan Betlehem, the assessor of the county court, and Zdravko Berković, an Ustaša Council representative, as members of the Special People's Court; Milan Stilinović, district court clerk, as the deputy judge; Ivan Gromes, the secretary of the district court, as the state prosecutor; and Berislav Lukinić, a local attorney, as the public defender for the accused.
All those appointed, with the exception of Stilinović and Lukinić, were either Ustaše collaborators or known sympathizers of Pavelić's regime. Early on the morning of 7 May, Puk confirmed the appointments by decree of the Ministry of Justice while the members of the "people's court" were still at the crime scene. According to the subsequent corroborating statements of Betlehem, Stilinović and Lukinić, the members of the "people's court" encountered a large group of prisoners at the Blagaj school, many of whom had visibly been beaten or otherwise tortured. According to surviving detainees, the prisoners had been tortured by Ustaše émigrés under Luburić's supervision. Ustaše from local "readiness units", numbering about 50 armed peasants, also participated. Infuriated by the Mravunac murders, many Croats from Blagaj and neighbouring Pavlovac apprehended their Serb neighbours and brought them to the Blagaj school for "questioning". Lasić repeated before the court that there was no evidence suggesting the perpetrators were Serbs or that there was a political motive behind the murders. He stood by his initial findings and reiterated that the crime was a "murder-robbery by unknown perpetrators". He noted that Mravunac's surviving daughter was unable to identify any of the perpetrators from a police lineup. Šarić promised the court that he would prepare a detailed report with proof that Serb rebels were to blame. The court reconvened at the Blagaj school, stated that there was no evidence to justify a trial and reached a unanimous decision that suspects would only be tried once sufficient evidence had been gathered. By the evening of 7 May, the judges had returned to Karlovac.
Massacre.
Luburić was dissatisfied with the court's "relatively lenient" decision, contending that it was not reached in accordance with "Ustaše regulations". Kvaternik also voiced his displeasure. That same day, he arranged for Vlado Singer, an old friend from Kvaternik's émigré days, to form a new "people's court" that would oversee legal proceedings and "try cases in the Ustaše way". On the morning of 8 May, Puk approved the creation of the new court, which convened at the Blagaj school later that day. Joso Rukavina was appointed president of the court, Josip Majić and Jakov Jurag were