The Rats of Tobruk (1944)
The Fighting Rats of Tobruk is a 1944 Australian film directed by Charles Chauvel. The film follows three drover friends who enlist in the Australian Army together during World War II. Their story is based on the siege of the Libyan city of Tobruk in North Africa by Rommel's Afrika Korps. The largely Australian defenders held the city for 250 days before being relieved by British forces.
More at Wikipedia.