Love Camp 7

The film that started the cycle, made in America six years before Ilsa.

Lee Frost and Bob Cresse were making nudie pictures and roughies on the Los Angeles fringe and worked out that a wartime setting let them show things a contemporary setting would not. Cresse produced it and cast himself as the commandant.

Two female agents volunteer to be interned to extract a scientist. The espionage plot exists to move them between rooms.

It is technically poor, it was shot for almost nothing, and its historical significance is that it demonstrated the formula worked commercially. Everything in this corner of the list descends from it.

Successfully prosecuted in Britain. Refused classification by the BBFC as recently as 2002, which makes it one of the very few DPP titles still effectively unavailable there.