Friends at arms: causing mischief (1962)

Ras, who has become a lieutenant in the Ranger Corps, visits his old barracks one day, where he meets all his former fellow recruits. They have just returned from an exercise, where, as usual, they have teased the sergeant major. They are now on their way to leave and suggest that Ras join them, but he declines, explaining that he has to plan an exercise with the Ranger Corps. He suggests that they sign up for the entrance exam, but the guys don't want to. However, they have no doubt that they could easily pass! On their way home from leave, they end up in the wrong train carriage, which drops them off in the middle of a deserted forest, and suddenly they are surrounded by paratroopers, and then they are put to the test...