The UN has never been able to maintain or complete a peace keeping mission without strong support from the US military. Not to mention that the UN leaders are corrupt. But sadly most politicians from any and all countries are corrupt in one way or the other. Plus the UN is a reactive and not a proactive unit and they are slow to react. When there is a crisis, by the time they come to a conclusion on what to do the crisis is either over or has escalated to beyond their capability.