The most infamous internment camps before World War II were used to intern the Spanish Republican refugees and military personnel during the Spanish Civil War. In 2 weeks in January and February 1939 around 500,000 men, women and children crossed the border. These were interned mostly in camps in the Roussillon Province, such as the Camp de concentration d'Argelès-sur-Mer although internment camps for defeated Spanish Republicans were established in all of French territory, even in Brittany, in the north-west of France. These camps were located in: