Rut is something that only occurs in males and it is essentially a need for sex and/or violence that sort of takes over. How often a male ruts and how intense it is often depends on the caste. Warlord Prince go through this far more often than a Warlord and it is far more intense. A Warlord or a Prince can even get away with simply fussing over a witch and touching them, but a Warlord Prince does not get that luxury and will either need sex or violence to lessen the edge. The rut of a Warlord Prince will last about a week.
They will focus on one female and anyone else who is seen as competition will be met with violence. It is a time when logic and rationality does not exist and when instinct takes over.