According to the Schlesinger report(and this now may be dated, but you get the general point), “Since the beginning of hostilities in Afghanistan and Iraq, U.S. military and security operations have apprehended about 50,000 individuals. From this number, about 300 allegations of abuse in Afghanistan, Iraq, and Guantanamo have arisen. As of mid-August 2004, 155 investigations into the allegations have been completed, resulting in 66 substantiated cases. Approximately one-third of these cases occurred at the point of capture or tactical collection point, frequently under uncertain, dangerous and violent circumstances.”

I wonder how the US prison system–with its full panoply of protections for prisoners being held in non-war zones–compares in terms of abuses per capita.