Following Bosnia and Herzegovina's declaration of independence, Bosnian Serb militias mobilized in different parts of the country. Government forces were poorly equipped and unprepared for the war. International recognition of Bosnia and Herzegovina increased diplomatic pressure for the Yugoslav People's Army (JNA) to withdraw from the republic's territory, which they officially did in June 1992. The Bosnian Serb members of the JNA simply changed insignia, formed the Army of Republika Srpska (VRS), and continued fighting. Armed and equipped from JNA stockpiles in Bosnia, supported by volunteers and various paramilitary forces from Serbia, and receiving extensive humanitarian, logistical and financial support from the Federal Republic of Yugoslavia, Republika Srpska's offensives in 1992 managed to place much of the country under its control. The Bosnian Serb advance was accompanied by the ethnic cleansing of Bosniaks and Bosnian Croats from VRS-controlled areas. Dozens of concentration camps were established in which inmates were subjected to violence and abuse, including rape. The ethnic cleansing culminated in the Srebrenica massacre of more than 8,000 Bosniak men and boys in July 1995, which was ruled to have been a genocide by the International Criminal Tribunal for the former Yugoslavia (ICTY). Bosniak and Bosnian Croat forces also committed war crimes against civilians from different ethnic groups, though on a smaller scale. Most of the Bosniak and Croat atrocities were committed during the Croat–Bosniak War, a sub-conflict of the Bosnian War that pitted the Army of the Federation of Bosnia and Herzegovina (ARBiH) against the HVO. The Bosniak-Croat conflict ended in March 1994, with the signing of the Washington Agreement, leading to the creation of a joint Bosniak-Croat Federation of Bosnia and Herzegovina, which amalgamated HVO-held territory with that held by the Army of the Republic of Bosnia and Herzegovina (ARBiH).