Title: Herzegovina
Content:  During World War II, Herzegovina was a battleground between fascist Croat Ustaše, royalist Serb Četniks, and the communist Yugoslav Partisans; Herzegovina was a part of the Independent State of Croatia, administratively divided into the counties of Hum and Dubrava, then in 1945, Socialist Republic of Bosnia and Herzegovina became one of the republics of Socialist Federal Republic of Yugoslavia. It remained so until the breakup of Yugoslavia in the early 1990s. During the Bosnian War, large parts of western and central Herzegovina came under control of the Croat republic of Herzeg-Bosnia (which later joined the Federation of Bosnia and Herzegovina) while eastern Herzegovina became a part of Republika Srpska.
Title: Greater Croatia
Content:  Community of Herzeg-Bosnia was established as an autonomous Croat territorial unit within Bosnia and Herzegovina. The leaders of Herzeg-Bosnia called it a temporary measure during the conflict with the Serb forces and claimed it had no secessionary goal. The Croatian Defence Forces (HOS), a paramilitary wing of the Croatian Party of Rights, supported a confederation between Croatia and Bosnia and Herzegovina, but on the basis of the NDH. Over time, the relations between Croats and Bosniaks worsened, resulting in the Croat–Bosniak War, which lasted until early 1994 and the signing of the Washington Agreement. Croatian President Franjo Tuđman was criticised for trying to expand the borders of Croatia, mostly by annexing 
Title: Partition of Bosnia and Herzegovina
Content:   Bosnia and Herzegovina has been a single entity occupying roughly the same territory since the rise of the medieval Kingdom of Bosnia and the subsequent Ottoman conquest of Bosnia between the 1380s and 1590s. The borders of today's Bosnia and Herzegovina were largely set as the borders of the Ottoman-era Eyalet of Bosnia, fixed in the south and west by the 1699 Treaty of Karlowitz, in the north by the 1739 Treaty of Belgrade, and in the east by the 1878 Treaty of Berlin. Although formally under Ottoman sovereignty, Austria-Hungary occupied the territory and created the Condominium of Bosnia and Herzegovina in 1878 before officially annexing it in 1908. Following World War I and the dissolution of Austria-Hungary, the territory passed in whole to the newly formed Kingdom of the Serbs, Croats and Slovenes in 1918. In 1922, it was internally divided into six oblasts of the Kingdom of Serbs, Croats and Slovenes.
Title: Republic of Bosnia and Herzegovina
Content:  The Republic of Bosnia and Herzegovina (Republika Bosna i Hercegovina / Република Босна и Херцеговина) was a state in Southeastern Europe, existing from 1992 to 1995. It is the direct legal predecessor to the modern-day state of Bosnia and Herzegovina. Bosnia and Herzegovina seceded from the disintegrating Socialist Federal Republic of Yugoslavia on 3 March 1992. This led almost immediately to the breakout of the Bosnian War which went on over the entire existence of the republic. Leaders from two of the three main ethnicities of Bosnia and Herzegovina, namely Serbs and Croats, established separate entities of the Republika Srpska and the Croatian Republic of Herzeg-Bosnia, respectively, which were unrecognized by the Bosnian state and international governments. Informally these events were considered as evidence that the Republic of Bosnia and Herzegovina represented primarily its Bosniak (mainly Muslim) population, though formally the presidency and government of the republic was still 
Title: Herzegovina
Content:  Slavs settled in the Balkans in the 7th century. What later became known as Herzegovina was divided between Croatia, Zachlumia and Travunija in the Early Middle Ages. Parts of the region were later ruled by various medieval rulers, with the eastern part mostly within Medieval Serbia, and the western part in the Kingdom of Croatia. During the 13th and 14th centuries the Bosnian bans Stjepan I Kotromanić and Stjepan II Kotromanić joined these regions to the Bosnian state, with the King Tvrtko I Kotromanić extending territories even further, beyond what is modern-day Herzegovina proper. During these times, parts of Herzegovina, or Hum, as it was called at the time, were ruled by powerful Bosnian magnates of Kosača family and its branch clans, namely Vuković, headed by Vlatko Vuković, who received it from the King Tvrtko I as 
Title: Bosnia and Herzegovina
Content:  Bosnia and Herzegovina (Bosna i Hercegovina / Босна и Херцеговина, ), abbreviated BiH or B&H, sometimes called Bosnia–Herzegovina and often known informally as Bosnia, is a country at the crossroads of south and southeast Europe, located in the Balkans. The capital and largest city is Sarajevo. Bosnia and Herzegovina borders Serbia to the east, Montenegro to the southeast, and Croatia to the north and southwest. It is not entirely landlocked; in the south it has a narrow coast on the Adriatic Sea within the Mediterranean, which is about 20 km long and surrounds the town of Neum. Bosnia, which is the inland region of the country, has a moderate continental climate with 
Title: Bosniaks
Content:   After World War I, the Kingdom of Serbs, Croats and Slovenes (later known as the Kingdom of Yugoslavia) was formed. In it, Bosniaks alongside Macedonians and Montenegrins were not acknowledged as a distinct ethnic group. However; the first provisional cabinet included a Muslim. Politically, Bosnia and Herzegovina was split into four banovinas with Muslims being the minority in each. After the Cvetković-Maček Agreement 13 counties of Bosnia and Herzegovina were incorporated into the Banovina of Croatia and 38 counties into the projected Serbian portion of Yugoslavia. In calculating the division, the Muslims were discounted altogether which prompted the Bosniaks into creating the Movement for 
Title: Serbs of Bosnia and Herzegovina
Content:  Serbian, with each encompassing most of the ethnic space of each ethnic group. Most of the territory of contemporary Bosnia and Herzegovina was to be part of the Banovina Serbia, since most of the territory of Bosnia and Herzegovina was majority Serb-inhabited, and the Serbs constituted overall relative majority. On 26 August 1939, the president of the Croatian Peasant Party, Vladko Maček and Dragiša Cvetković made an agreement (Cvetković-Maček agreement) according to which a Banovina of Croatia was created which included Sava and the Littoral Banovina, along with a number of districts in southern Dalmatia, the Srem, and north-western Bosnia. Around 20% of the 
Title: Bosnia and Herzegovina–Croatia relations
Content:   Both Bosnia and Herzegovina and Croatia were engaged in the early-1990s Yugoslav wars. In parallel to its own war of independence, Croatia was involved in the armed conflict on Bosnia and Herzegovina's territory. At first, Bosniaks and Croats fought in an alliance against the Yugoslav People's Army (JNA) and the Army of Republika Srpska (VRS). By the end of 1992, however, tensions in Central Bosnia increased, leading to open conflict by early 1993, when Croats established the Croatian Republic of Herzeg-Bosnia. The Croat–Bosniak War opposed from 18 October 1992 to 23 February 1994 the Republic of Bosnia and Herzegovina and the self-proclaimed Croatian Republic of Herzeg-Bosnia, supported by Croatia. Most of the fighting took 
Title: Socialist Republic of Bosnia and Herzegovina
Content:  Herzegovina was, up to 20 December 1990, in sole control of the League of Communists of Bosnia and Herzegovina, the Bosnian branch of League of Communists of Yugoslavia. The borders of SR Bosnia and Herzegovina were almost identical to the one Condominium of Bosnia and Herzegovina had during the period of Austro-Hungarian rule that lasted until 1918. That year Bosnia became part of the Kingdom of Serbs, Croats, and Slovenes and divided into several banovinas (regional administrative units), namely parts of Vrbas, Drina, Zeta and Croatia banovinas. With the establishment of a People's Republic, its modern borders were delineated.

Question: bosnia and herzegovina croatia macedonia and slovenia all used to be parts of?
Answer: Yugoslavia.