A guerrilla group is a small, mobile, and flexible force that uses unconventional tactics to fight against larger traditional military forces. These groups often operate in a specific region and rely on surprise attacks, ambushes, and sabotage to achieve their objectives. They typically aim to undermine the authority of a government or occupying power. Guerrilla warfare is characterized by its emphasis on mobility and the element of surprise. Members of a guerrilla group often blend in with the local population, making it difficult for enemy forces to identify them. This strategy has been used in various conflicts throughout history, including the Vietnam War and the Spanish Civil War.