The Bosnian Serbs’ separatist leader vowed to carry on weakening his war-scarred country to the point where it will tear apart, despite a pledge by the United States to prevent such an outcome.

“I am not irrational, I know that America’s response will be to use force … but I have no reason to be frightened by that into sacrificing (Serb) national interests,” Milorad Dodik, the president of Bosnia’s Serb-run part, told The Associated Press in an interview Friday.

He said any any attempt to use international intervention to further strengthen Bosnia’s shared, multiethnic institutions will be met by Bosnian Serb decision to abandon them completely and take the country back to the state of disunity and dysfunction it was in at the end of its brutal interethnic war in the 1990s.

Because Western democracies will not be agreeable to that, he added, “in the next stage, we will be forced by their reaction to declare full independence” of the Serb-controlled regions of Bosnia.