As we saw in Dr Strangelove, Peter Sellers is extremely adept and talented at playing many roles. However, in this lame and unfunny comedy, he literally falls flat on his (many) face(s).
It might be due to the winds of time and the changing tastes in comedy, but as someone who would have very young at this film's release, I didn't laugh once, neither at the jokes nor the visual slapstick.
Sure, this send-up of everything second world war (Sellers plays all the world leaders, it seems) could have provided many comedy highlights but at times it's just painfully embarrassing. The dodgy accents either grate or annoy. I found the 'story' impossible to follow, assuming there actually was one and within half an hour had lost interest and only followed it to the end for reviewing purposes.
The oft nude working girls of the 1940's Paris-set brothel made this an X-certificate novelty back 40 years ago and today, the toplessness a mere '12' certificate. These are pleasant distractions for the average male viewer of course but the novelty soon wears off and soon we are amidst the awful masks that Sellers wears to turn himself 'Japanese'. Even though the film runs for 90 minutes, it seems far longer.
There's also a young-ish Timothy West as a Cardinal and Curt Jurgens as an SS Officer. I bought it the with the set of three, along with the excellent The Wrong Arm of the Law and Never Let Go. Watch those, forget this.