The power of guerrilla warfare is essentially psychological. In conventional warfare everything converges on the engagement of two armies in battle. That is what all strategy is devised for and what the martial instinct requires as a kind of release from tension. By postponing this natural convergence indefinitely, the guerrilla strategist creates intense frustration. The longer this mental corrosion continues, the more debilitating it gets. Napoleon lost to the Russians because his strategic bearings were pushed off course; his mind fell before his army did.
