The same thing happened in Rwanda, when the UN was there, the UN turned tail and ran when the Hutus with machetes came after them. They should have just mowed em all down, but the UN believes in dialog and writing angry letters instead.
I only say this because I believe the soldiers on the ground in Rwanda cared deeply and wished they could do more but their hands were tied above them. At one point they were denied the ability to even carry weapons. That said they did follow orders and often abandoned many Rwandans, who were subsequently killed.
I have read a great deal about Rwanda and it haunts me very much to this day.