Tattoo
At times during history, people have been forced to get tattoos to mark them as slaves, criminals, or outsiders. For example, the ancient Romans tattooed criminals and slaves. In the 19th century, the United States marked convicts with tattoos before releasing them from jail, and the British Army marked deserters with tattoos. In the 20th century, prisoners in Siberian and Nazi concentration camps were tattooed with identification numbers.