The Irregulars were known to attack less-defended military target, including bureaucratic cores, factories, garrisons and space stations, to rob storehouses, to jam communications and to terrorize, and sometimes kill, high-ranking officers, in all the cases using targets affiliated to the Empire. They also run when faced with opposition, forcing the Empire to search for their secret bases.[1]
As the Empire could not ignore these attackers, the only choice was to assign an overwhelming amount of resources to neutralize badly-funded units. While doing so, the Empire was diverting their resources from other, more important jobs such as finding the Alliance commanders.[1]