Although the word "concentration camp," has since been primarily associated with Nazi concentration camps during World War II (1939-1945), the word was in use earlier in wider contexts as a place where many people were concentrated in one location, in this case Army troops during the Delhi Darbar of 1911. Nonetheless, the earliest use of the term to denote a place where prisoners were held, often in appalling conditions, was during the Second Anglo-Boer War 1900-02 in South Africa. The British held Boer (Dutch-speaking, South African colonial) prisoners in facilities that gained notoriety for the many who died there of starvation and disease. British newspapers and campaigners helped draw attention to camp conditions.
Army Concentration Camp, Delhi Darbar