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| Gallipoli expedition | |
|---|---|
| Conflict | Gallipoli expedition |
| Partof | First World War |
| Date | 25 April 1915 – 9 January 1916 |
| Place | Gallipoli Peninsula, Dardanelles Strait, Aegean Sea |
| Result | Ottoman Empire victory |
| Combatant1 | United Kingdom; France; Australia; New Zealand; India; Newfoundland; Anzac Corps |
| Combatant2 | Ottoman Empire; German Empire |
| Commander1 | Winston Churchill; John Fisher; Ian Hamilton; Horace Smith-Dorrien; William Birdwood |
| Commander2 | Enver Pasha; Mustafa Kemal Atatürk; Liman von Sanders; Suleyman Sami Bey |
| Strength1 | approx. 500,000 |
| Strength2 | approx. 250,000 |
| Casualties1 | approx. 250,000 |
| Casualties2 | approx. 250,000 |
Gallipoli expedition The Gallipoli expedition was a 1915–1916 Allied campaign aimed at forcing the Dardanelles Strait and knocking the Ottoman Empire out of the First World War. Initiated by naval operations and followed by large-scale amphibious landings, the campaign involved the Royal Navy, the French Navy, the Australian and New Zealand Army Corps, and diverse imperial formations against forces commanded by Ottoman and German officers. The campaign influenced political careers, including those of Winston Churchill and Ian Hamilton, and shaped national memories in Australia, New Zealand, and Turkey.
Allied strategists sought a maritime route to Constantinople to relieve pressure on the Eastern Front and supply Russia under the constraints of the Ottoman Empire alliance with the Central Powers. Precedents included operations in the Baltic Sea and earlier naval attempts by the Royal Navy in the Crimean War and the Russo-Turkish War (1877–78). Diplomatic contexts involved the Entente Cordiale, the Franco-British Military Convention, and coordination with the Imperial War Cabinet and military authorities in London and Paris. Intelligence assessments drew on reports from the Naval Intelligence Division, MI5 predecessors, and attachés in Constantinople.
Political advocates such as Winston Churchill and naval planners like John Fisher argued for a decisive strike to seize the Dardanelles Strait and capture Constantinople to force the Ottoman Empire from the war and open sea lines to Russia. The War Office, the Admiralty, and the French General Staff debated force composition, including contributions from the Royal Naval Division, the French Foreign Legion, and colonial contingents from Australia, New Zealand, and British India. Strategic options considered direct naval bombardment, combined operations modeled on the Gallipoli concept, and diversionary raids akin to operations at Antalya and Kavak. Political figures such as David Lloyd George, H. H. Asquith, and military leaders including Sir Ian Hamilton weighed risks against alternatives like the Western Front offensives.
Initial operations were conducted by the Royal Navy and the French Navy, with battleships and monitors attempting to force the Dardanelles and to neutralize shore batteries emplaced around the Narrows, Sedd el Bahr, and Bulair. Mines laid by Ottoman minelayers and actions by German advisors under Liman von Sanders inflicted losses on capital ships like the HMS Irresistible and HMS Ocean, while cruisers and destroyers provided shore bombardment and amphibious support. Submarine operations by vessels from the Royal Navy Submarine Service and the French Navy Submarine Force penetrated the Sea of Marmara, targeting Ottoman logistics in Gallipoli Peninsula approaches. Naval gunfire supported landings at Cape Helles and Anzac Cove, though coordination problems among the Royal Navy, the British Army, and allied navies hampered effectiveness.
The amphibious landings on 25 April 1915 involved the ANZACs at Anzac Cove and British and French forces at Cape Helles, including landings at Suvla Bay and V Beach. Key engagements included the Landing at Cape Helles, the Battle of Krithia series, the Battle of Chunuk Bair, the Battle of Lone Pine, and the Suvla Bay landing. Commanders such as William Birdwood, Horace Smith-Dorrien, and Mustafa Kemal Atatürk directed operations amid difficult terrain at Gully Ravine, The Nek, and the Sari Bair Range. Allied assaults sought to seize high ground and cut Ottoman communications, while counterattacks and defensive depth prevented breakthroughs, producing trench warfare reminiscent of the Western Front.
Ottoman defense integrated units of the Ottoman Army under leaders including Enver Pasha and corps commanders advised by German officers like Liman von Sanders. A pivotal role was played by then-Lieutenant Colonel Mustafa Kemal Atatürk, whose decisions at ANZAC Cove and Chunuk Bair earned recognition in later Turkish historiography and in the foundation narratives of the Republic of Turkey. Ottoman forces employed artillery from positions at Sedd el Bahr, fortifications along the Hellespont, and mobile counterattacks from divisions raised in Anatolia and reinforced by units from Constantinople and Salonika.
Logistical challenges arose from limited beaches, inadequate ports at Anzac Cove and Suvla Bay, and reliance on pontoons and piers susceptible to weather and enemy fire. Disease, including dysentery and typhoid fever, spread through crowded trenches and camps supplied via Mudros Harbor and the Aegean islands such as Lemnos. Medical evacuation used hospital ships like the HMHS Britannic and field hospitals organized by the Royal Army Medical Corps and the French Medical Corps, while burial grounds and cemeteries were established by the Commonwealth War Graves Commission and Ottoman authorities. Casualty figures incurred heavy losses among units including the 1st Australian Division, the NZEF, the Royal Irish Regiment, and Ottoman divisions, with combined killed, wounded, and missing numbering in the hundreds of thousands.
The campaign ended with an Allied evacuation completed in January 1916, an operation planned under commanders such as Charles Monro and executed using deception measures later studied in amphibious doctrine. Politically, the expedition affected careers of Winston Churchill, David Lloyd George, and military figures like Ian Hamilton and influenced subsequent campaigns including the Sinai and Palestine Campaign and the Salonika Campaign. Commemorations such as Anzac Day and memorials at Helles Memorial and Lone Pine Cemetery commemorate participants from Australia, New Zealand, United Kingdom, France, India, and Newfoundland, while Turkish remembrance centers on Çanakkale Martyrs' Memorial and the legacy of Mustafa Kemal Atatürk. The campaign informed interwar naval theory, amphibious doctrine in the Royal Navy and United States Navy, and collective memory in nations formed from the Ottoman Empire's dissolution.
Category:Campaigns of World War I Category:Battles of the Gallipoli campaign