Foreign fighters in the Bosnian War The Bosnian War , which was fought between Bosnia and Herzegovina , Croatia , and Serbia , attracted large numbers of foreign fighters and mercenaries from various countries . Volunteers came to fight for a variety of reasons including religious or ethnic loyalties and in some cases for money . As a general rule , Bosniaks received support from Islamic countries , Serbs from Eastern Orthodox countries , and Croats from Catholic countries . The presence of foreign fighters is well documented , however none of these groups comprised more than 5 percent of any of the respective armies ' total manpower strength . Foreign fighters . For the Bosniaks . Arab volunteers came across Croatia into Bosnia to help the Bosnian Army fight in the war . The number of the " El - Mudžahid " volunteers is still disputed , from around 300 to 6 , 000 . These caused particular controversy : foreign fighters , styling themselves " mujahideen " , turned up in Bosnia around 1993 with Croatian identity documents , passports and IDs . They quickly attracted heavy criticism , who considered their presence to be evidence of violent Islamic fundamentalism at the heart of Europe . However , the foreign volunteers became unpopular even with many of the Bosniak population , because the Bosnian army had thousands of troops and had no need for more soldiers , but for arms . Many Bosnian Army officers and intellectuals were suspicious regarding foreign volunteers arrival in central part of the country , because they came from Split and Zagreb in Croatia , and were passed through the self - proclaimed Croatian Community of Herzeg - Bosnia without problems unlike Bosnian Army soldiers who were regularly arrested by Croat forces . According to general Stjepan Šiber , the highest ranking ethnic Croat in Bosnian Army , the key role in foreign volunteers arrival was played by Franjo Tuđman and Croatian counter - intelligence underground with the aim to justify involvement of Croatia in Bosnian War and mass crimes committed by Croat forces . Although Izetbegović regarded them as symbolically valuable as a sign of the Muslim world ' s support for Bosnia , they appear to have made little military difference and became a major political liability . On August 13 , 1993 , the Bosnian Army decided to form a unit , " Kateebat al - Mujahideen " ( " Battalion of the Holy Warriors " ) or " El Mudžahid " to impose control over the foreign fighters whose number increased . Initially , the foreign Mujahideen gave food and other basic necessities to the local Muslim population , deprived many necessities by the Serb forces . Once hostilities broke out between the Bosnian government ( ABiH ) and the Croat forces ( HVO ) , the Mujahideen also participated in battles against the HVO alongside Bosnian Army units . According to the Arab fighters who testified as the prosecution witnesses at the trial of Bosnian general Rasim Delić indicted by the International Criminal Tribunal for the former Yugoslavia ( ICTY ) on the basis of superior criminal responsibility , the El Mujahid Detachment was only formally part of the Bosnian Army chain of command . All decisions were taken by the " emir " and the " shura " , the Mujahideen commander and the Mujahideen supreme council respectively . This was because the ‘ Army couldn ’ t be trusted ’ . It is alleged that mujahideen participated in some incidents considered to be war crimes according to the international law . However no indictment was issued by the ICTY against them , but a few Bosnian Army officers were indicted on the basis of superior criminal responsibility . Amir Kubura and Enver Hadžihasanović were found not guilty on all counts related to the incidents involving mujahideen . Furthermore , the Appeals Chamber noted that the relationship between the 3rd Corps of the Bosnian Army headed by Hadžihasanović and the El Mujahedin detachment was not one of subordination but was instead close to overt hostility since the only way to control the detachment was to attack them as if they were a distinct enemy force . During and after the war , the government at the time , led by Alija Izetbegović , was thought to have bent the law when granting citizenship to the mujahideen . As of 2007 , the Bosnian government says that a commission reviewed a list of more than 1 , 000 names and has revoked citizenship for about 420 people so far . The mujahideen units were disbanded and required to leave the Balkans under the terms of the 1995 Dayton peace accord . Although the US State Department report suggested that the number could be higher , a senior SFOR official said allied military intelligence estimated that no more than 200 foreign - born militants actually live in Bosnia . Propaganda . According to the ICTY verdicts , Serb propaganda constantly propagated false information about the foreign fighters to inflame anti - Muslim hatred among Serbs . After the takeover of Prijedor by Serb forces in 1992 , Radio Prijedor propagated Serb nationalistic ideas characterising prominent non - Serbs as criminals and extremist s who should be punished for their behaviour . One example of such propaganda was the derogatory language used for referring to non - Serbs such as mujahideen , Ustaša or Green Berets . According to ICTY conclusion in Stakić verdict Mile Mutić , the director of Kozarski Vjesnik and the journalist Rade Mutić regularly attended meetings of Serb politicians ( local authorities ) to be informed of the next propaganda steps . Another example of propaganda about Islamic holy warriors is presented in the ICTY " Kordić and Čerkez verdict " for war crimes and crimes against humanity committed by Croatian Community of Herzeg - Bosnia leadership on Bosniak civilians . It claimed that Gornji Vakuf was attacked by the Croatian Army ( HV ) and the Croatian Defence Forces ( HVO ) in January 1993 followed by heavy shelling of the town by Croat artillery . During cease - fire negotiations at the Britbat HQ in Gornji Vakuf , colonel Andrić , representing the HVO , demanded that the Bosnian forces lay down their arms and accept HVO control of the town , threatening that if they did not agree he would flatten Gornji Vakuf to the ground . For the Croats . The Croats received support from Croatia and the Croatian Army fought with the local Croatian Defence Council ( HVO ) forces . Some external fighters included British volunteers as well as other numerous individuals from the cultural area of Western Christianity , both Catholics and Protestants fought as volunteers . Dutch , American , Irish , Polish , Australian , New Zealand , French , Swedish , German , Hungarian , Norwegian , Canadian and Finnish volunteers were organized into the Croatian 103rd ( International ) Infantry Brigade . There was also a special Italian unit , the Garibaldi battalion . and one for the French , the groupe Jacques Doriot . Volunteers from Germany and Austria were also present , fighting for the Croatian Defence Forces ( HOS ) paramilitary group . This armed group was organized by the Croatian Party of Rights ( HSP ) , a right - wing party , and was disbanded by the legal Croatian authorities in late 1992 . HSP ' s leader , Dobroslav Paraga was later charged with treason by the Croatian authorities . Swedish Jackie Arklöv fought in Bosnia and was later charged with war crimes upon his return to Sweden . Later he confessed he committed war crimes on Bosniak civilians in the Croatian camps Heliodrom and Dretelj as a member of Croat forces . For the Serbs . The Serbs received support from Orthodox Christian countries , from countries including the Federal Republic of Yugoslavia ( Serbia and Montenegro ) , Greece and Russia . Primary Russian forces consisted of two organized units known as " РДО - 1 " and " РДО - 2 " ( РДО stands for " Русский Добровольческий Отряд " , which means " Russian Volunteer Unit " ) , commanded by Yuriy Belyayev and Alexander Zagrebov , respectively . РДО - 2 was also known as " Tsarist Wolves " , because of the monarchic views of its fighters . There also was unit of Russian cossacks , known as " Первая Казачья Сотня " ( First Cossack Sotnia ) . All these units were operating mainly in Eastern Bosnia along with Rebuplika Srpska forces from 1992 up to 1995 . In April 1995 , the commander of the Russian contingent in UNPROFOR Sector East in Croatia , Russian Major General Aleksandr Perelyakin , who had been dismissed for smuggling weapons to Serbs , was appointed as adviser to the commander of a Serb division in the self - proclaimed Republika Srpska Krajina in Croatia . In May 1995 , Serb Herzegovina Corps intended to organize an international brigade in eastern Bosnia which gathered between 150 and 600 Greek and Russian mercenaries fighting for 200 German mark s monthly . Greek volunteers were also reported to have taken part in the Srebrenica Massacre , with the Greek flag being hoisted in Srebrenica when the town fell to the Serbs . The Greeks were organized in March as the " Greek Volunteer Guard " ( GVG ) and had around 100 soldiers . Some Greek volunteers were members of a Greek nationalist party Golden Dawn .