Guerrilla movements are organized groups that use unconventional tactics to fight against larger, more traditional military forces. These tactics often include ambushes, sabotage, and hit-and-run attacks, allowing smaller groups to leverage their knowledge of the local terrain and gain an advantage over their opponents. Guerrilla fighters typically aim to undermine the authority of a government or occupying force. These movements often arise in response to oppression or foreign occupation, seeking to mobilize local populations for support. Historical examples include the Vietnamese Viet Cong during the Vietnam War and the Cuban Revolution led by Fidel Castro. Guerrilla warfare can significantly impact the course of conflicts and political landscapes.