Wagtails Army (Russian: Армия «Трясогузки», romanized: Armiya 'Tryasoguzki', Latvian: Cielaviņas armija) is a 1964 Soviet family film directed by Aleksandrs Leimanis.

The protagonists of this adventure film are a group of homeless boys who decide to assist the Red Army.

Suddenly, a train derails, a sabotage operation attributed to a mysterious group calling itself the "Swallow Army."

The Kolchak counterintelligence service, furious and desperate, begins a relentless search for the underground conspirators, though without success.

The film tells the story of how these resourceful and courageous boys aided the Bolsheviks in liberating the city from the White Army forces.