The concept of Holy War appears in one way or another within the world's Traditions.
Besides its view from a socio-political angle, we see how Holy War represents the inner struggle of man towards Divine Realization.

Holy War seeks to restore balance and justice within all domains of manifestation which ultimately symbolizes the return of All things to Divine Unity.
It is from this understanding that makes the battlefield of one's own self the hardest and greatest of all battlefields as presented by the Prophet Muhammad.