The Unknown Soldier is a Finnish war film directed by Edvin Laine that premiered in December 1955. It is based on The Unknown Soldier, a novel by Väinö Linna. The story is about the Continuation War between Finland and the Soviet Union as told from the viewpoint of ordinary Finnish soldiers.

The Unknown Soldier or Unknown Soldiers is a war novel by Finnish author Väinö Linna, considered his magnum opus. Published in 1954, The Unknown Soldier chronicles the Continuation War between Finland and the Soviet Union during 1941–1944 from the viewpoint of ordinary Finnish soldiers. In 2000, the manuscript version of the novel was published with the title Sotaromaani and in 2015, the latest English translation as Unknown Soldiers. A fictional account based closely on Linna's own experiences during the war, the novel presented a more realistic outlook on the formerly romanticized image of a noble and obedient Finnish soldier. Linna gave his characters independent and critical thoughts, and presented them with human feelings, such as fear and rebellion.