The Slovenian and Croatian leaderships started preparing plans for secession from the federation, while a part of the Serbs of Croatia started the so-called Log Revolution, an insurrection organized by Serbia that would lead to the creation of the breakaway region of SAO Krajina. In the Slovenian independence referendum on 23 December 1990, 88.5% of residents voted for independence. In the Croatian independence referendum on 19 May 1991, 93.24% voted for independence.