When was the National Legion of Decency formed? July 26, 2012 by Pamela Landy · Filed Under: Movies The National Legion of Decency was formed in 1934, by a group of Roman Catholic bishops. Through it, films were reviewed and rated for their decency. If the movie was not approved, a boycott was advised. Related PostsWhen was the National Baseball League formed?How does one go about joining the French Foreign Legion?When do scientists believe the earth formed?When was Twentieth Century Fox formed?When did “The Star-Spangled Banner” become the national anthem for America?