On 4 August 1995, Croatia launched the Operation Storm, recapturing bulk of the RSK-held territory within days in the largest European land battle since the World War II, encompassing a frontline. It restored , representing 18.4% of the Croatia's territory, to Croatian control. Defeat of the RSK reversed the tide of Yugoslav Wars against the Serbs, giving the US diplomacy a strong boost. The success of the Operation Storm allowed Croatian and Bosnian leadership to plan a full-scale military intervention in Bosnian-Serb-held Banja Luka area of Bosnia and Herzegovina, aimed at creating a new balance of power there, a buffer zone along Croatian border, and contributing to resolution of the Bosnian War. The intervention would materialize as the Operation Mistral 2 of September 1995, albeit combined with a NATO air campaign in Bosnia and Herzegovina, contributing to start of peace talks that would result with the Dayton Agreement a few months later, as well as restoration to the remaining Serb-held areas in eastern Slavonia and Baranya to Croatia through the Erdut Agreement.