Noun
irregular warfare (uncountable)
Warfare in which one or more combatants are irregulars (such as partisans, guerrillas or insurgents) rather than regular military forces.
(in particular) Warfare with the aim of gaining or establishing political authority using asymmetric warfare tactics.
It describes the origins of the irregular warfare training at Inverailort House under MI(R) then the move of SOE training to the nearby Arisaig and Morar area. Source: Internet
This is especially true of irregular warfare where mines were used on an ad hoc basis in unmarked areas. Source: Internet