In 1990, following the electoral defeat of the government of the Socialist Republic of Croatia, ethnic tensions between Croats and Serbs worsened. The Yugoslav People's Army ("Jugoslovenska Narodna Armija" – JNA) confiscated Croatia's Territorial Defence ("Teritorijalna obrana" - TO) weapons to minimize resistance. On 17 August, the tensions escalated into an open revolt by Croatian Serbs, centred on the predominantly Serb-populated areas of the Dalmatian hinterland around Knin, parts of the Lika, Kordun, Banovina and eastern Croatia. This was followed by two unsuccessful attempts by Serbia, supported by Montenegro and Serbia's provinces of Vojvodina and Kosovo to obtain the Yugoslav Presidency's approval for a JNA operation to disarm Croatian security forces in January 1991.