The Immortal Garrison (Russian: Бессмертный гарнизон, Bessmertnyy garnizon) is a 1956 Soviet war film directed by Zakhar Agranenko and Eduard Tisse.

The events take place in the Brest Fortress during the period of June 22 through July 20, 1941 at the beginning of The Great Patriotic War, at the moment when German forces invaded the Soviet Union in June 1941.

At the outset, the film depicts the daily lives of the garrison's residents, including soldiers and their families.

However, the tranquility is shattered when the first artillery shells strike the fortress, marking the beginning of a fierce assault.

Unaware that the front line is retreating, the garrison holds its positions, resolutely fighting back and waiting for reinforcements that will never arrive.