27th Regiment and 108th Regiment (Madras Infantry) amalgamate.

The Royal Inniskilling Fusiliers

The Secretary of State for War, Hugh Childers, restructured the infantry regiments of the British Army in 1881 in what was known as the Childers Reforms. The 27th Inniskillings and the 108th Regiment became the 1st and 2nd Battalions The Royal Inniskilling Fusiliers. The Fermanagh, Tyrone and Donegal Militia Regiments initially became the 3rd, 4th and 5th Battalions, but later the 3rd (Fermanagh) Battalion became the 4th, and the 4th (Tyrone) Battalion became the 3rd.