Mavri legeon was released in the year 1937。Mavri legeon is also called as Black Legion, Svarta ligan, Musta legioona, Legião Negra, Hemmelig terror, Czarny legion, Geheimbund 'Schwarze Legion'。

Frank Taylor joins the "pro-American" Black Legion when he loses his chance at foremanship to a foreign-born man. The organization is a sort of Ku Klux Klan in the industrial sphere. Frank has troubles with his wife over this and causes serious trouble when he tells all to his best friend Ed Jackson.

Mavri legeon actors and actresses include Ann Sheridan, Humphrey Bogart。