This photo makes it clear that the US was aware of the use of Chinese as “Comfort Women” early on in the war.
“1941 Press Photo Burma Cpl L Gallagher of Britain with prisoners in his jeep. This is an original press photo. Burma With prisoners captured by British and Indian troops in south east Asia Command in Burma’s Wenwegon area along Toungoo Pegu road were Chinese girls taken into captivity at Canton and forced to act as comfort corps to Japanese soldiers.”