Terrorist groups generally do not employ subversion as a tool to achieve their goals. Subversion is a manpower-intensive strategy and many groups lack the manpower and political and social connections to carry out subversive activities. However, actions taken by terrorists may have a subversive effect on society. Subversion can imply the use of insidious, dishonest, monetary, or violent methods to bring about such change. This is in contrast to protest, a coup d'état, or working through traditional means in a political system to bring about change. Furthermore, external subversion is where, "the aggressor state attempts to recruit and assist indigenous political and military actors to overthrow their government by coup d’état". If subversion fails in its goal of bringing about a coup it is possible that the actors and actions of the subversive group could transition to insurrection, insurgency, and/or guerilla warfare.