It s very rare to find rape of VC girls comics or manga. This war had a lot to offer regarding Guro though . . .
In the book "The Women of Vietnam", the author wrote of various ways GIs raped Vietnamese women. There was a picture of a woman on the ground with a knife wound to her body inflicted by a GI while or after raping her.
Captured GIs were "rewarded" for this type of behaviour with castration. The GIs were often tortured and had their genitals sliced off by Vietnamese women getting their revenge for rape.