Alerta en la frontera is a 1941[a] Peruvian propaganda film directed by German director Kurt Herrmann.

[2] The film features pictures of daily life in Lima during the 1940s, including the post-war victory parade in the National Stadium of Peru with president Manuel Prado Ugarteche attending.

[3][4] Originally meant to be a newsreel, the amount of material shot developed into the need to make a feature film.

[5] It was not until 70 years later that the film was found in the archive warehouses of the Center for Military Historical Studies.

After its discovery, it was screened in the district of Miraflores during the Sobre héroes y tumbas exhibition,[6] finally premiering at the 2014 Lima Film Festival.