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| 10th (Irish) Division | |
|---|---|
| Unit name | 10th (Irish) Division |
| Dates | August 1914 – 1919 |
| Country | United Kingdom |
| Branch | British Army |
| Type | Infantry |
| Role | Expeditionary |
| Size | Division |
| Command structure | Kitchener's New Armies |
| Battles | Gallipoli Campaign; Salonika Campaign; Mesopotamian campaign; Siege of Kut; Fall of Baghdad |
| Notable commanders | Sir Bryan Mahon; Sir John Longley; Aylmer Hunter-Weston |
10th (Irish) Division was an infantry formation raised for service in the British Army during the First World War as part of Kitchener's New Armies. Formed from volunteers from Ireland and deployed to multiple theatres, the division fought at Gallipoli Campaign, on the Salonika Campaign and in Mesopotamian campaign operations including the Siege of Kut and the capture of Baghdad. It embodied links between Irish political life, imperial strategy, and wartime mobilization across United Kingdom wartime structures.
The division was created in August 1914 under the directive of Lord Kitchener and assembled within the framework of Kitchener's Army from volunteers drawn from Ulster, Munster, Connacht, and Leinster counties, reflecting recruitment patterns tied to figures such as John Redmond and organizations like the Irish Volunteers and the National Volunteers. Early formation saw regimental cadres provided by established units including the Royal Irish Rifles, Royal Inniskilling Fusiliers, Royal Dublin Fusiliers and the Connaught Rangers, integrating pre-war militia traditions such as the Special Reserve. Initial training occurred on Salisbury Plain and in Irish depots linked to Cork, Dublin, and Belfast before strategic redeployment to Mediterranean embarkation points at Liverpool and Southampton.
Deployed to the Mediterranean Expeditionary Force for the Gallipoli Campaign, the division took part in operations on the Suvla Bay and Anzac Cove sectors alongside formations such as the 29th Division and the 42nd (East Lancashire) Division. After the evacuation from Gallipoli in January 1916 it was transferred to Salonika as part of the British Salonika Force to confront the Central Powers presence in the Balkans alongside French and Serbian Army contingents. In 1917–1918 strategic priorities shifted and elements of the division were redeployed to Mesopotamia under the command of Sir Stanley Maude and then Maude-led forces, participating in the renewed offensive that relieved the Siege of Kut legacy, captured Baghdad in March 1917 and advanced towards Mosul in conjunction with units such as the Indian Army formations and the 13th (Western) Division.
Throughout these campaigns the division operated in conjunction with expeditionary commanders including Aylmer Hunter-Weston and coordinated logistic and medical support with organizations like the Royal Army Medical Corps and Royal Army Service Corps, confronting diseases endemic to the theatre such as malaria and dysentery that inflicted casualties comparable to combat losses.
The division comprised three infantry brigades and supporting arms: the 29th, 30th and 31st Brigades were built around battalions from Irish regiments including the Royal Irish Regiment, Royal Dublin Fusiliers, Royal Munster Fusiliers, Royal Dublin Fusiliers and the Connaught Rangers, supplemented by machine gun companies of the Machine Gun Corps and trench mortar batteries. Artillery elements included brigades of the Royal Field Artillery and Royal Horse Artillery detachments, while engineers came from the Royal Engineers and signal units from the Royal Corps of Signals. Cavalry reconnaissance was provided intermittently by squadrons of the Royal Dublin Fusiliers and attached yeomanry such as the 3rd County of London Yeomanry (Sharpshooters). Medical, logistic and ordnance support was rendered by the Royal Army Medical Corps, Royal Army Service Corps, and the Army Ordnance Corps.
Senior commanders who led the division at various times included Sir Bryan Mahon, who presided during formation and early service, followed by Aylmer Hunter-Weston during Gallipoli phases and later commanders such as Sir John Longley during Salonika and Mesopotamia operations. Leadership also involved subordinate brigade commanders drawn from veterans of pre-war regiments like the Royal Irish Rifles and professional staff officers who had served on the Curragh Camp and in the Second Boer War, interacting with higher theatre commanders including Sir Ian Hamilton and Sir George Milne.
Combat and disease produced substantial casualties; battalion war diaries record heavy losses at Suvla Bay and attrition on the Salonika Campaign, while Mesopotamian operations incurred fatalities during the relief of Kut and the advance on Baghdad. Individual soldiers received decorations including the Victoria Cross, Distinguished Service Order, and Military Cross for actions by personnel attached to Irish battalions. The division's legacy figures in memorials across Ireland, regimental museums such as the National Museum of Ireland collections, and in commemoration by societies preserving links to the Royal Dublin Fusiliers and Connaught Rangers histories.
Following the armistice and the reorganization of forces, the division was demobilized in 1919 amid the wider dissolution of Kitchener's New Armies units and the postwar restructuring of the British Army. Veterans returned to a changed political landscape shaped by the Easter Rising (1916), the Irish War of Independence and the Government of Ireland Act 1920, influencing remembrance practices. Commemoration took forms such as regimental rolls of honour, battlefield memorials at Gallipoli and in Iraq, published unit histories, and inclusion in national memorials like the Roll of Honour, St. Patrick's Cathedral and civic memorials in Cork and Belfast.
Category:Infantry divisions of the British Army in World War I Category:Military units and formations established in 1914 Category:Military units and formations disestablished in 1919