Operation X-70 (1971)

" "Operation X-70" clinically describes the accidental invasion of a country - the 'Nebelux', which looks surprisingly much like Belgium. "A powerful nation tests a new combat gas, which neither kills nor wounds or suffocates, but which causes the victims to become lethargic and mystical. X-70 gas bombs are erroneously dropped on the Nebelux and cause a mutation among the population of this charming little country. A-typical and so little 'animated', "Operation X-70" was a culminating point in Servais' career: the film won the Special Jury Prize at the 1972 Cannes Film Festival and the First Prize at the Zagreb International Animation Film Festival. "