March on the River Drina

The film takes place in Serbia during World War I, primarily in Belgrade (the mobilization point), then moving through Aranđelovac and Lazarevac toward Cer Mountain in western Serbia. The climactic battles unfold along the Drina River, which serves as the frontline backdrop between Serbia and Austro-Hungarian-controlled Bosnia.

The film is set in 1914, during the July general mobilization and the early months of World War I. It covers the Serbian army's initial defense and subsequent counteroffensive that pushed Austro-Hungarian forces back across the Drina River into Bosnia.

The film explores three interconnected themes: Duty & Courage, examining the tension between personal ambition and national service; Strategy & Leadership, showing how commanders make critical tactical decisions under pressure; and Sacrifice & Resilience, depicting the unit's endurance through retreats, casualties, and ultimate perseverance against overwhelming odds.

Poručnik Miloje is a young artillery second lieutenant from a wealthy banking family. Rather than accepting a comfortable desk commission, he is driven by a strong sense of duty to serve on the front line. His internal conflict represents the tension between family expectations for safety and his personal aspiration to fulfill his national duty.

Major Kursula is an infantry major who assesses the main Austro-Hungarian attack route. He advocates for engaging the enemy along the Drina front rather than attempting a crossing at the Sava River. Reporting from Tekeriš, he participates in key strategic decisions that shape the Serbian defense and subsequent counterattack at Cer Mountain.

General Stepa Stepanović is the supreme commander of the Serbian army during the Battle of Cer. He rejects proposals to cross the Sava River and instead orders redeployment to the Drina front. He directs the defense around Cer Mountain and coordinates the successful counteroffensive that drives Austro-Hungarian forces back across the Drina into Bosnia.

The artillery sergeant (Narednik) demonstrates quick thinking and sacrifice when he disassembles a gun to prevent its capture during a retreat. His action symbolizes the individual soldier's willingness to give up equipment and risk everything for the greater good, highlighting the improvisation and personal sacrifice that characterizes the Serbian defense.

Cer Mountain serves as the strategic focal point of the Serbian defense. The Serbian army redeploys there to confront Austro-Hungarian forces that have crossed the Drina River. The Battle of Cer, fought on and around this mountain, becomes the first Allied victory over the Central Powers in World War I, marking a pivotal turning point in the campaign.

The film portrays Serbian leadership as decisive under pressure. Major Kursula advocates for the Drina-front engagement over alternative strategies, while General Stepa Stepanović makes the critical call to redeploy forces to Cer Mountain rather than pursue a riskier Sava crossing. The narrative emphasizes how these tactical choices, made amid uncertainty, ultimately shape the success of the defense and counterattack.

Through the sergeant's act of destroying his own weapon to prevent enemy capture and through the mounting casualties during assaults and withdrawals, the film emphasizes that victory requires individual sacrifice. The final counteroffensive, achieved through a costly retreat and renewed attack, underscores that resilience in war comes at a significant human cost.

Belgrade serves as the mobilization starting point in the film. From the capital, the Serbian artillery battery of the Combined Division undertakes a forced march westward through Serbia toward Cer Mountain, passing through towns like Aranđelovac and Lazarevac as they proceed to the Drina front.