The Army of Republika Srpska, commonly referred to in English as the Bosnian Serb Army, was the military of Republika Srpska, the self-proclaimed secessionist republic, a territory within the newly independent Republic of Bosnia and Herzegovina, which it defied and fought against. Active during the Bosnian War from 1992 to 1995, the Bosnian Serb Army under General Ratko Mladić became the most proficient military force in the Balkans, as well as one of the most reviled armies in the world. After the war it continued to exist as the armed forces of Republika Srpska, one of two entities making up Bosnia and Herzegovina, until 2006 when it was integrated into the Armed Forces of Bosnia and Herzegovina. During the conflict, the Bosnian Serb Army conducted several major operations, including Operation Corridor 92, Operation Vrbas '92, Operation Lukavac, Operation Shield '94, and Operation Spider; The army also took part in the Siege of Sarajevo, the longest siege of a capital city in modern history, as well as in the Srebrenica massacre.