1993 saw no major changes in the front lines against Serbs . Instead , this year marked the start of the Croat – Bosniak War in Central Bosnia and in Herzegovina , notably the Mostar region . Pressured and contained by heavily armed Serb forces in Bosnia-Hercegovina and Croatia , ethnic Croat militia forces &ndash; the Croatian Defence Council ( HVO ) &ndash; shifted their focus from defending their parts of Bosnia from Serbs to trying to capture remaining territory held by the Bosnian Army . It is widely believed that this was due to the Karađorđevo agreement reached between presidents Slobodan Milošević and Franjo Tuđman to split Bosnia between Croatia and Serbia . In order to accomplish this Croatian forces would have to defeat the Bosnian Army , since the territory that they wanted was under Bosnian government control . The HVO with great engagement from the military of the Republic of Croatia and material support from Serbs , attacked Bosniak civilian population in Herzegovina and in central Bosnia starting an ethnic cleansing of Bosniak populated territories , such as in the Lašva Valley ethnic cleansing
Lašva Valley ethnic cleansing
Lašva Valley ethnic cleansing
Army of the Republic of Bosnia and Herzegovina