The Maquis were Spanish guerrillas who waged an irregular warfare against the Francoist dictatorship within Spain following the Republican defeat in the Spanish Civil War until the early 1960s, carrying out sabotage, robberies and assassinations of alleged Francoists as well as contributing to the fight against Nazi Germany and the Vichy regime in France during World War II. They also took part in occupations of the Spanish embassy in France.

The Maquis were rural guerrilla bands of French and Belgian Resistance fighters, called maquisards, during the German military administration in occupied France during World War II. Initially, they were composed of young, mostly working-class, men who had escaped into the mountains and woods to avoid conscription into Vichy France's Service du travail obligatoire which provided forced labor for Germany. To avoid capture and deportation to Germany, they became increasingly organized into active resistance groups.