자유전선 (1955) / The Battle line of Freedom (Ja-yujeonseon)

A defector who once tried to pull his family north instead watches the Korean War scatter them across both sides of the front, from an isolated infantry unit to a field hospital tent. Rescue, guilt and one prisoner's late change of heart carry this 1955 combat drama to its close, shot while the war it depicts was barely two years finished.

Why it's free: Free on the Korean Film Archive's own channel; the national archive holds and restores the prints it publishes.