Undercover is a 1943 British war film produced by Ealing Studios, originally titled Chetnik. It was filmed in Wales and released on 27 July 1943. Its subject is a guerrilla movement in German-occupied Yugoslavia, loosely based on Draza Mihailovich's Chetnik resistance movement.

Underground Guerrillas (1943)
Directed by Sergei Nolbandov
Description by Wikipedia
Movie Info
Tags
Guerrilla, United States, Yugoslavia
Attributes
Narrative Location: Serbia
Subject: World War II
Subject: World War II
Alternate Titles
Ilegalci
YU
Iroiki thysia
GR
Kallista verta
FI
Por su honor
MX
Uma Luz no Horizonte
PT
Undercover
, GB
Underground Guerrillas
US