Defining internment and concentration camp
The American Heritage Dictionary defines the term concentration camp as: "A camp where persons are confined, usually without hearings and typically under harsh conditions, often as a result of their membership in a group which the government has identified as dangerous or undesirable."
Although the first example of civilian internment may date as far back as the 1830s, the English term concentration camp was first used in order to refer to the reconcentrados (reconcentration camps) which were set up by the Spanish military in Cuba during the Ten Years' War (1868–78). and similar camps were set up by the United States during the Philippine–American War (1899–1902). The term concentration camp saw wider use during the Second Boer War (1899–1902), when the British operated such camps in South Africa for interning Boers, and they later set up other internment camps during the Mau Mau Uprising against the British Empire in Kenya (1952–1960), and internment camps were also set up in Chile during the military dictatorship of Augusto Pinochet (1973–1990).
During the 20th century, the arbitrary internment of civilians by the state reached its most extreme form with the establishment of the Nazi concentration camps (1933–45). The Nazi concentration camp system was extensive, with as many as 15,000 camps and at least 715,000 simultaneous internees. The total number of casualties in these camps is difficult to determine, but the deliberate policy of extermination through labor in many of the camps was designed to ensure that the inmates would die of starvation, untreated disease and summary executions within set periods of time. Moreover, Nazi Germany established six extermination camps, specifically designed to kill millions, primarily by gassing.
As a result, the term "concentration camp" is sometimes conflated with the concept of an "extermination camp" and historians debate whether the term "concentration camp" or the term "internment camp" should be used to describe other examples of civilian internment.
Some international media reports have claimed that as many as 3 million Uyghurs and members of other Muslim minority groups are being held in China's re-education camps which are located in the Xinjiang region.