BOPA (, Civil Partisans) was a group of the Danish resistance movement operating at the time of the occupation of Denmark by Nazi Germany during the Second World War. In 1942, the illegal Communist Party of Denmark had begun organising small sabotage cells across the country, mainly formed by veterans who had been part of the volunteer anti-Franco brigades of the Spanish Civil War. However, as arms were scarce, the weapon of choice was often petrol and matches, and only small scale operations were carried out.