5th Royal Irish Lancers

5th Royal Irish Lancers
Cap badge of the regiment
Active1689–1799
1858–1922
Country United Kingdom
Branch British Army
TypeCavalry
RoleLine Cavalry
Size1 Regiment
Nickname(s)The Redbreasts
Motto(s)Quis separabit (Who shall separate us?)
MarchSlow: Let Erin Remember, The Harp That Once Through Tara's Halls
Commanders
Notable
commanders
Field Marshal Richard Molesworth, 3rd Viscount Molesworth

General Joseph Yorke, 1st Baron Dover
General Robert Cuninghame, 1st Baron Rossmore
Major General Thomas Arthur Cooke
Major-General Sir Henry Jenner Scobell

Field Marshal Edmund Allenby, 1st Viscount Allenby

The 5th Royal Irish Lancers was a cavalry regiment of the British Army. It saw service for three centuries, including the First World War. It amalgamated with the 16th The Queen's Lancers to become the 16th/5th Lancers in 1922.