What was the largest union civil war camps

Camp Douglas, in Chicago, Illinois, sometimes described as "The North's Andersonville," was one of the largest Union Army prisoner-of-war camps for Confederate soldiers taken prisoner during the American Civil War

tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.

your answer would be just capitalism.