The Great Retreat was the retreat of the Royal Serbian Army through the mountains of Albania during the winter of 1915–16 in World War I. In Serbian memory and historical discourse, the event is often described as the Albanian Golgotha () or Serbian Golgotha (), due to the large number of casualties and hardships experienced by the retreating Serbian soldiers and civilians. It is considered to be a defining event in Serbian history.
In late October 1915, Germany, Austria-Hungary and Bulgaria launched a synchronised major offensive, under German leadership, against Serbia. Earlier that month, France and Britain landed four divisions at Salonika, under the commands of General and General Sir Byron Mahon, to assist their outnumbered Serbian ally caught between the invading forces. The Royal Serbian Army fought while retreating southwards with the plan to withdraw into Macedonia and link up with Entente forces. After the defection of Greece, Bulgarian forces halted the Franco-British relief force in the Vardar Valley. The Serbs were eventually pushed into the plain of Kosovo by the converging Austro-Hungarian, German, and Bulgarian columns.
To escape encirclement, on 23 November 1915, the Serbian government and supreme command made the joint decision to retreat across the mountains of Montenegro and Albania. The objective was to reach the Adriatic coast, where the Serbian Army could reorganise and reequip with Allied assistance. The retreat involved the remnants of the army, King Peter I, hundreds of thousands of civilian refugees, and prisoners of war. Between November 1915 and January 1916, during the journey across the mountains, 77,455 soldiers, 47,000 prisoners of war and 160,000 civilians froze, starved to death, died of disease, or were killed by enemy raids. Austrian pilots used the new technology of the time, dropping bombs on the retreating columns in what has been described as 'the first aerial bombardment of civilians'.
The Serbian retreat is considered one of the most devastating in modern military history, with immense human and strategic consequences. Of the 400,000 people who set out on the journey, only 120,000 soldiers and 60,000 civilians reached the Adriatic coast, where they were evacuated by Allied ships to the island of Corfu. There, a Serbian government-in-exile was established, headed by Prince-Regent Alexander and . A further 11,000 Serbs would later die from disease, malnutrition, or exposure sustained during the retreat. The Serbian Army would later contribute to Allied efforts on the Salonica front, playing a key role in the liberation of Serbia.
Background First Serbian campaign
On 28 July 1914, a month after the assassination of Austrian Archduke Franz Ferdinand, Austria-Hungary, the second-largest country in Europe, declared war on Serbia, marking the beginning of the First World War. The conflict began on the night of 28–29 July with the Austro-Hungarian bombardment of Belgrade. On 12 August, Austro-Hungarian forces under General launched their first offensive into Serbia. The , a force intended for the invasion of Serbia and Montenegro consisting of the 5th Army and 6th Army, began operations with the 5th Army advancing south-east via the upper Drina River.
Despite initial setbacks, the Serbian Army, under General , used the mountainous terrain and defence strategy to achieve a decisive victory at the Battle of Cer on 17 August. Serbia became the first Allied nation to secure a victory in the First World War, forcing all Austro-Hungarian forces to retreat from Serbian territory less than two weeks after the first offensive. The historic defeat dealt an incalculable blow to Habsburg prestige. Following the initial failure, Austria-Hungary regrouped and launched a second invasion in September 1914. In the Battle of the Drina, the Serbian Army repelled the 5th Army, forcing them to retreat but the Austro-Hungarian forces retained a foothold in Serbian territory, from which they would launch a third offensive.
The third invasion, launched in October 1914, led to the capture of Belgrade on 2 December 1914 before a successful Serbian counter-offensive at the Battle of Kolubara forced the Central Powers to retreat from Serbia by the end of the month, concluding the campaign. General was dismissed from command on 22 December along with 5th Army commander . In response to repeated setbacks and rising frustration among Austro-Hungarian forces, elements of the Austro-Hungarian Army committed war crimes against Serbian civilians, including executions, mass deportations, and burning of villages.
Second Serbian campaign
In early 1915, the German Chief of the General Staff, , persuaded the Austro-Hungarian Chief of Staff, , to launch a renewed invasion of Serbia. This effort gained further momentum in September 1915 when Bulgaria formally aligned itself with the Central Powers, signing a treaty with Germany and mobilising its forces. The offensive began on 6 October 1915, as German and Austro-Hungarian forces, commanded by Field Marshal , launched a large-scale attack on Serbia from the north and west. Their strategy aimed to pin down the bulk of the Serbian Army along the Sava and Danube Rivers, preventing them from responding effectively to further attacks.
On 11 October, without a formal declaration of war, the Bulgarian Army began its advance, launching attacks on Serbian border positions. Three days later, on 14 October, Bulgaria officially declared war on Serbia. Its First Army under General , advanced on in order to link with German Eleventh Army. The Bulgarian Second Army under General Georgi Todorov was to proceed into Macedonia, with the objective of severing the Salonika railway, which ran through the and Great Morava River valleys, cutting off Serbia’s reinforcements and artillery supplies. Bulgarian forces overwhelmed Serbia’s thinly spread border defences while Serbian troops were locked in heavy combat against German and Austro-Hungarian forces advancing from the north. At the same time, additional Austrian troops advanced from the west, further stretching Serbian defensive lines.
By 6 November, the Bulgarian First Army had linked up with General ’s Eleventh German Army near . On 10 November, Bulgarian forces crossed the Southern Morava south of , and launched an attack on the Serbian Army. Although significantly outnumbered, Serbian forces managed to hold for two days before being forced to retreat. With Austro-Hungarian, German, and Bulgarian forces advancing from the north and the Bulgarian Second Army pressing from the east, the Serbian Army, lacking any defensible positions, was forced to retreat south-west into the territory of Kosovo.
Prelude Kosovo offensive, 10–24 November
Approximately 300,000 Serbian soldiers and between 50,000 and 60,000 refugees found themselves gathered in Kosovo, the last defensible area before a possible retreat. The region held deep symbolic significance for Serbian national identity, and many saw the moment as part of a broader historical cycle, recalling the 1389 Battle of Kosovo, the 1813 collapse of the First Serbian Uprising, and the recent victories of the Balkan Wars in 1912 and 1913 respectively.
By mid-November, Serbian forces had reached Pristina ahead of their pursuers but were unable to break south due to the Bulgarian Second Army's blockade at Kaçanik Gorge. This prevented a link-up with French forces under General in Salonika. The Central Powers, led by Field Marshal , aimed to trap the Serbian Army in Kosovo and force a final, decisive battle. The severing of the ––Salonika railway further isolated Serbia from its allies, worsening the situation. Field Marshal attempted to concentrate his forces at Kosovo field, but Serbian defences were rapidly deteriorating.
As Serbian forces retreated, the Austro-Hungarian , that until then provided air support to the Austro-Hungarian Army and communications between the German Eleventh and Bulgarian First Armies, began bombing both military positions and civilian refugee columns, marking one of the first recorded cases of aerial bombardment against civilians. Albanian armed groups launched guerrilla attacks on isolated Serbian detachments, seeking revenge for past Serbian military actions in Kosovo after its annexation in 1913. The entire Bulgarian Army, supported from the north by parts of the Eleventh German Army, now advanced against the Serbs.
On 23 November, following intense fighting, the Serbian lines collapsed. Pristina and fell to the Central Powers, and the Serbian government abandoned , its last wartime capital in Serbia. The Serbian Army, now reduced to around 220,000 soldiers and accompanied by 80,000 refugees, had little choice but to retreat toward Montenegro and Albania.
The Serbian leadership considered three options: capitulation and a separate peace, a final defensive battle, or retreat. While a counteroffensive was briefly discussed, the decision was made to withdraw rather than surrender. The only available route for retreat led south-west and north-west, across the Korab and Accursed Mountains mountain ranges in Albania and Montenegro, part of the Dinaric Alps, where elevations exceeded 6,000 feet (1,800 m) and harsh winter conditions had already set in. The Serbian government, led by Prime Minister , Prince Regent Alexander, and the Supreme Command under Field Marshal , ordered a general withdrawal. The plan was to regroup in exile, reorganise the army, and continue the war with Allied support.
Order of retreat, 25 November With no remaining strongholds, the Serbian High Command issued an official retreat order on 25 November 1915, instructing all units to withdraw toward the Adriatic coast. To prevent capture, artillery, vehicles, and supplies were either abandoned, destroyed, or thrown into ravines. Some weapons were buried, while government documents were either hidden or burned. King Peter I noted in his diary that soldiers resorted to burning official records to keep warm in the freezing conditions.
issued an order requiring 36,000 boys between the ages of twelve and eighteen to accompany the army during the retreat. The decision was made to prevent them from being captured by enemy forces and to ensure the preservation of future military manpower for Serbia. On 25 November 1915, the Serbian High Command issued an official order of retreat to all army commanders, directing the withdrawal of Serbian forces:
Retreat The Serbian Army split into three columns, moving toward the rugged terrains of Albania and Montenegro, to reach the Adriatic coast, pursued by the Austro-Hungarian Tenth Mountain Brigade and the German Alpine Corps. King Peter I, despite his advanced age and frail health, insisted on accompanying the retreating army, traveling through the rugged terrain in an ox cart. His presence served as a morale boost for the exhausted troops, as he had symbolically resumed leadership during the crisis.
Severe winter conditions and rugged terrain proved insurmountable for the Austro-Hungarian Tenth Mountain Brigade as it attempted to continue its advance south from . The only available route led through a steep, ice-covered mountain pass at an altitude of , making further movement nearly impossible. Exposure to freezing temperatures had already resulted in 30 casualties among the Austrian forces. Faced with increasing logistical challenges and worsening conditions, Mackensen decided to abandon the pursuit on 24 November 1915, marking the end of the campaign.
With their pursuers no longer an immediate threat, the Serbian Army and tens of thousands of civilians continued their retreat along three separate routes, converging at Lake Skadar on the Albanian-Montenegrin border before heading toward the Adriatic coast. Many civilians were fleeing massacres committed by Austro-Hungarian forces, contributing to the sheer scale of the exodus.