concentration camp, a detention site outside the normal prison system created for military or political purposes to confine, terrorize, and, in some cases, kill civilians. The term was first used to describe prison camps used by the Spanish military during the Cuban insurrection (1868–78), those created by America in the Philippines (1898–1901), and, most widely, to refer to British camps built during the South African War South African War or Boer War, 1899–1902, war of the South African Republic (Transvaal) and the Orange Free State against Great Britain.
..... Click the link for more information. (Boer War) to confine Afrikaners in the Transvaal and Cape Colony (1899—1902). The term soon took on much darker meanings. In the USSR, the Gulag Gulag, system of forced-labor prison camps in the USSR, from the Russian acronym [GULag] for the Main Directorate of Corrective Labor Camps, a department of the Soviet secret police (originally the Cheka; subsequently the GPU, OGPU, NKVD, MVD, and finally the KGB).
..... Click the link for more information. elaborated on the concept beginning as early as 1920. After 1928, millions of opponents of Soviet collectivization as well as common criminals were imprisoned under extremely harsh conditions and many died.

During World War II concentration camps were established throughout Europe by the Nazis, and throughout Indochina and Manchuria by the Japanese. Of the millions of people of many nationalities detained in them, a large proportion died of mistreatment, malnutrition, and disease. In both Nazi and Japanese camps inmates were exploited for slave labor and medical experimentation, but the Nazis also established extermination camps. In the best known of these—Majdanek, Treblinka, and Oświęcim (Auschwitz), in Poland—more than six million mainly Jewish men, women, and children were killed in gas chambers. Among the most notorious Nazi camps liberated by U.S. and British troops in 1945 were Buchenwald, Dachau, and Belsen.

The term has also been applied to the U.S. relocation centers relocation center, in U.S. history, camp in which Japanese and Japanese-Americans were interned during World War II. Fearing a Japanese invasion, the military leaders, under authority of an executive order, defined (Mar.
..... Click the link for more information. for American citizens of Japanese origin and others interned in the W United States during World War II. In China during the Cultural Revolution (1966–69) millions were sent to euphemistically named "reeducation" camps, and in Cambodia after Pol Pot came to power (1976) an estimated one million civilians died in "reeducation" camps. North Korea maintains a system of political and criminal prison camps in which inmates are sentenced to harsh physical labor and are underfed and mistreated. In 1992, reports of malnutrition and killings in concentration camps for Muslim, Croat, and Serb male civilians in Bosnia led to attempts by international organizations to identify the location of the camps and inspect them.

concentration camp

Internment centre established by a government to confine political prisoners or members of national or minority groups for reasons of state security, exploitation, or punishment. The prisoners are usually selected by executive decree or military order. Camps are usually built to house many people, typically in highly crowded conditions. Countries that have used such camps include Britain during the South African War, the Soviet Union (see Gulag), the U.S. (see Manzanar Relocation Center), and Japan, which interned Dutch civilians in the Dutch East Indies during World War II. A variation, called a “reeducation camp,” was used in Vietnam after 1975 and in Cambodia under the Khmer Rouge. Most notorious were the death camps of Nazi Germany, including Auschwitz, Bergen-Belsen, Buchenwald, Dachau, and Treblinka.