 The JNA initially tried to keep Croatia within Yugoslavia by occupying all of Croatia. After this failed, Serb forces established the self-proclaimed Republic of Serbian Krajina (RSK) within Croatia. After the ceasefire of January 1992 and international recognition of the Republic of Croatia as a sovereign state, the front lines were entrenched, the United Nations Protection Force (UNPROFOR) was deployed, and combat became largely intermittent in the following three years. During that time, the RSK encompassed 13,913 square kilometers (5,372 sq mi), more than a quarter of Croatia. In 1995, Croatia launched two major offensives known as Operation Flash and Operation Storm, which would effectively end the war in its favor. The remaining United Nations Transitional Authority for Eastern Slavonia, Baranja and Western Sirmium (UNTAES) zone was peacefully reintegrated into Croatia by 1998.
