Military theorists like Clausewitz and Liddell Hart generalized the Guerilla Warfare through researching military history. T.E. Lawrence, Mao Zedong, Vo Nguyen Giap and Che Guevara's theories of Guerilla Warfare were based on their real experiences. The nature of Guerilla Warfare was asymmetric when one side is always outnumber by its opponent. The model of Guerilla warfare will pass on even the future warfare, which has been defined in the form of high-tech joint operation. However, when encountering an invasion of superior power, the defensive side would not only conduct regular defensive operations but also adapt the options of Guerilla Warfare. The asymmetry would allow a less-advantaged state to fight a war of endurance, conduct surprise attacks, and gradually attrit the invasion forces so as to prevent the invasion or withdrawal of forces.