Fifth Army (Ottoman Empire)

Fifth Army (Ottoman Empire) was a field army of the Ottoman Army that was activated during World War I. It is most famous for its successful defense of the Gallipoli peninsula against the Allied invasion in 1915. Following the Gallipoli campaign, the army was redeployed to the Caucasus front where it fought against Russian forces until the empire's collapse.

Formation and early history

The Fifth Army was formed in March 1915 specifically to counter the growing threat of an Allied amphibious assault on the strategically vital Dardanelles strait. Its headquarters was established in the town of Gelibolu on the Gallipoli peninsula. The army's creation was a direct response to the failed Allied naval attacks in February and March, with the Ottoman high command anticipating a major ground invasion. The initial core of the army was drawn from existing units within the First and Second Armies, rapidly reinforced with new divisions. This hurried formation was overseen by the head of the German military mission to the Ottoman Empire, who played a key role in the Ottoman war effort.

World War I service

The Fifth Army's defining moment was the Gallipoli campaign, which began with the Allied landings on April 25, 1915. Commanded by the German general Otto Liman von Sanders, the army fiercely resisted the assaults by troops from the British Empire, including forces from Australia, New Zealand, Newfoundland, and France. Key battles included the First Battle of Krithia, the Battle of Sari Bair, and the climactic Battle of Chunuk Bair. The successful defense, which forced the Allied evacuation in January 1916, was a major victory for the Central Powers. In 1916, the army was transferred to the Caucasus campaign, where it fought in the Battle of Erzurum and subsequent operations against the Russian Caucasus Army. It continued fighting in this theater through the Russian Revolution and the subsequent instability, eventually facing the advance of the British Dunsterforce in 1918.

Order of battle

At the start of the Gallipoli campaign, the Fifth Army was organized into three corps, defending the entire peninsula and the Asian shore. The III Corps, commanded by Esat Pasha, held the critical northern sectors at Cape Helles and Anzac Cove. The XV Corps was positioned on the Asian side at Kum Kale and Beykoz. The newly formed XIX Corps under Mustafa Kemal was held in reserve at Biga. This structure proved effective in containing the beachheads. Later, during the Caucasus campaign, its order of battle was significantly altered, incorporating units like the I Caucasian Corps and the II Caucasian Corps, reflecting the different demands of mountain warfare against the Imperial Russian Army.

Commanders

The Fifth Army had several commanding officers during its existence. Its first and most famous commander was the German general Otto Liman von Sanders, who led it through the entirety of the Gallipoli campaign. Following the transfer to the Caucasus, command passed to Ottoman generals. Mahmut Kâmil Pasha commanded the army during critical phases of the Caucasus campaign in 1916. He was succeeded by Esat Pasha, a veteran of the defense of Gallipoli, who had previously commanded the III Corps. Other commanders in the final years of the war included Ali İhsan Pasha and Cevat Pasha, who managed the army's retreat and dissolution amid the crumbling of the Ottoman front after the Battle of Megiddo.

Legacy and disbandment

The Fifth Army's legacy is inextricably linked to the Ottoman victory at Gallipoli, a campaign that cemented the military reputation of Mustafa Kemal Atatürk and became a foundational story for the modern nations of Turkey, Australia, and New Zealand. The army itself was disbanded in the aftermath of the Armistice of Mudros in October 1918, which ended Ottoman participation in World War I. Many of its veteran troops and officers later formed the nucleus of the Turkish National Movement forces during the Turkish War of Independence. The sites of its major battles on the Gallipoli peninsula are preserved as the Gallipoli Campaign National Historic Park, a site of annual remembrance and pilgrimage.

Category:Field armies of the Ottoman Empire Category:Military units and formations established in 1915 Category:Military units and formations disestablished in 1918