page_title: List of Northumberland Fusiliers battalions in World War I
section_title: 24th, 25th, 26th and 27th (Service) Battalions (Tyneside Irish)
hierarchical_section_title: List of Northumberland Fusiliers battalions in World War I / Battalions / 24th, 25th, 26th and 27th (Service) Battalions (Tyneside Irish)
context_page_description: This is a list of Northumberland Fusiliers battalions in World War I. When the First World War broke out in August 1914, the Northumberland Fusiliers, a fusilier infantry regiment of the British Army, consisted of 7 battalions, eventually expanding to 52 battalions, although not all existed at the same time, of which 29 served overseas. It was the second largest infantry regiment of the British Army during World War I, surpassed only by the 88 battalions of the London Regiment.
  The Northumberland Fusiliers earned 67 battle honours and was awarded five Victoria Crosses, but at the cost of over 16,000 soldiers killed in action, and many thousands wounded. The Northumberland Fusiliers mostly saw action in the main theatre of war, engaged in static trench warfare on the Western Front in Belgium and France, but also participated in fighting on the Macedonian front, the Gallipoli Campaign, the Sinai and Palestine Campaign and the Italian Front.
context_section_description: The 1st – 4th Tyneside Irish Battalions were Pals battalions raised in Newcastle by the Lord Mayor and City on 14 November (1st), 9 November (2nd), 23 November 1914 (3rd) and 5 January 1915 (4th).  In March 1915 they moved to Woolsington and together they formed 103rd (Tyneside Irish) Brigade, 34th Division in June 1915.  They were taken over by the War Office on 27 August 1915, moved to Salisbury Plain at the end of the month and crossed to France in January 1916.  Due to extremely heavy casualties suffered during the attack at La Boiselle on 1 July 1916, the Brigade was attached to the 37th Division between 6 July and 22 August 1916 in exchange for 112th Brigade.
  On 10 August 1917, the 24th and 27th Battalions were amalgamated as the 24th/27th Battalion.  British divisions on the Western Front were reduced from a 12-battalion to a 9-battalion basis in February 1918 (brigades from four to three battalions): the 25th Battalion joined the 102nd (Tyneside Scottish) Brigade on 3 February and the 24th/27th and 26th Battalions were disbanded on 26 February.  As a result of the losses suffered in the Ludendorf Offensive (First Battle of the Somme and Battle of the Lys), 102nd Brigade had to be extensively reorganized.  On 16 May 1918, the 25th Battalion was reduced to cadre and transferred to Lines of Communication duties; it joined 39th Division on 17 June, to 66th Division on 16 August and to 197th Brigade on 20 September where it remained for the rest of the war.  25th Battalion was disbanded in France in June 1919.
  While part of the 34th Division, the Tyneside Irish took part in the following major actions:
  Battle of the Somme (1916) – Battle of Albert
  Battle of Arras (1917)
  Third Battle of Ypres
  First Battle of the Somme (1918)
  Battle of the Lys (1918)
caption: A support company of the Tyneside Irish Brigade advancing on 1 July 1916.
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