Following the Nazi invasion of the Soviet Union on June 22, 1941 the Germans banned the Danish Communist Party and had the Danish police arrest its members. Those members who either avoided arrest or later escaped thus went underground and created resistance cells. From October 1942, they published a clandestine newspaper, "Land og Folk" ("Land and People"), based on the previous Communist Party newspaper, "Arbejderbladet", which was distributed widely across the country. Circulation grew to 120,000 copies per day by the end of the occupation. At the beginning of 1943, the cells were centrally coordinated under BOPA ("Borgerlige Partisaner" - Civil Partisans), which also began to plan acts of sabotage.