109th Brigade (United Kingdom)

The 109th Brigade was a formation of the British Army during the First World War. It was raised as part of the new army also known as Kitchener's Army and assigned to the 36th (Ulster) Division. The brigade served on the Western Front.

Formation
The infantry battalions did not all serve at once, but all were assigned to the brigade during the war.
 * 9th Battalion, Royal Inniskilling Fusiliers (County Tyrone)
 * 10th Battalion, Royal Inniskilling Fusiliers (Derry)
 * 11th Battalion, Royal Inniskilling Fusiliers (Donegal and Fermanagh)
 * 14th Battalion, Royal Irish Rifles (Young Citizens)
 * 109th Machine Gun Company
 * 109th Trench Mortar Battery
 * 1st Battalion, Royal Inniskilling Fusiliers
 * 2nd Battalion, Royal Inniskilling Fusiliers