Guerrillas are members of irregular military groups that use unconventional tactics to fight against larger, traditional forces. They often operate in small, mobile units and rely on surprise attacks, ambushes, and sabotage. Guerrilla warfare is typically employed in situations where the opposing force is significantly stronger, allowing the smaller group to exploit their knowledge of the local terrain. Historically, guerrilla tactics have been used in various conflicts, such as the Vietnam War and the Spanish Civil War. These fighters often gain support from local populations, which can provide resources and intelligence. The goal of guerrilla warfare is to weaken the enemy's resolve and capabilities over time.