The Nun and the Sergeant

The Nun and the Sergeant is a 1962 Korean War drama starring Anna Sten and Robert Webber in the title roles. It was produced by Stens husband Eugene Frenke, who had produced Heaven Knows, Mr Allison, also a pairing of a Catholic nun and a U.S. Marine. It was directed by Franklin Adreon and released through United Artists.

The Marines change their views when Sgt. McGrath protects the group. When one of their squad Leo Gordon attempts to rape one of the young girls, the brig rats turn against him. They proceed with their mission as Marines.Don Cerveris was an English teacher breaking into screenwriting one of his pupils was Frank Zappa. Producer Frenke sought Department of Defense cooperation for the film in 1960 when the project was originally titled The Nun and McGrath. The stars of the film, Robert Webber and Hari Rhodes, and director Franklin Adreon were former Marines. ........

Source: Wikipedia