The Tammisaari camp was a concentration camp and prison in Dragsvik, Ekenäs in Finland. It was set for the Reds captured by the Whites in the 1918 Finnish Civil War. The concentration camp operated from May 1918 to 15 September 1918 when the majority of the captured Reds were released on parole. Tammisaari camp was then turned into a forced labour camp for convicted Reds and later in the early 1920s into a facility for political prisoners. Tammisaari camp was known as the most notorious of all Finnish Civil War prison camps. Between May and September 1918 nearly 3,000 of the 8,700 prisoners died of executions, disease or malnutrition.