This study explores whether the association between substance use and involvement in youth violence is a unique association resulting from the properties of the drugs, or whether it is part of a larger behavioral cluster. The sample was composed of 1,571 10th grade students from the Israeli secular and religious state school systems, including both Jewish and Arab schools. The results indicate that the strongest predictor for unplanned violent activities such as physical fights is alcohol use, suggesting that this chemical substance may lower the threshold of unplanned violence. However, daring was found to be the strongest predictor for planned violent activities such as bullying and weapon carrying, suggesting that the behavioral pattern is the most influential. Thus future research and intervention programs would perhaps benefit from differentiating between planned and unplanned violence. (Contains 1 table and 2 figures.)