After the parade in Rome, a group of ex-servicemen and war veterans meet for lunch in a trattoria on the shores of Lake Bracciano. At the table sit a sergeant of the paratroopers, a sailor, an infantry marshal and two former bersaglieri. Lunch becomes the ideal occasion to share a series of anecdotes and adventures they experienced during their days of military service.
In the first story, Tony Renis is called up for military service in the paratroopers. His unit mates decide to play a prank on him, making him believe that Sergeant Cerrutti's residence is actually a dating house. Renis falls into the trap and runs into the sergeant's three sisters, mistaking them for prostitutes. The misunderstanding continues until the arrival of his superior, who punishes him with discipline. In the end, Renis agrees to sing at a party organised by his comrades.
In the second story, two sailors decide to attend a show with dancers and magicians. During the show, one of the two sailors is hypnotised and begins to believe he is a woman. He takes off his uniform, puts on women's clothes and goes to a beauty salon and then to a dance hall, where he performs singing along with Fred Bongusto. The other sailor follows him, manages to retrieve him and bring him to his senses, escaping capture by the military patrol.
In the third story, Antonio Zanelli, known for his laziness, does everything to avoid military service. He starts by trying to pay a swindler to get himself exempted, but ends up losing money. Then, he tries to pretend to be ill with an ulcer to escape the military march, but to no avail. Finally, he decides to court Laura, the daughter of Marshal Pozzilli, hoping that this will help him get sent home. Instead, the strategy fails and Zanelli is enlisted as a non-commissioned officer cadet.
In the last story, two former bersaglieri tell of being involved in an incredible adventure during the African campaign, near Amba Alagi. They claim to have ended up in a village of natives and to have risked losing their manhood. In reality, this story is completely fictional, because during the years 1935 to 1943, the two had hidden near the clothing warehouse in Velletri and avoided being involved in the war.