Let Erin Remember / Harp That Once Through Tara's Halls - Slow March of the 5th Royal Irish Lancers

The 5th Royal Irish Lancers was a cavalry regiment of the British Army. It saw service for three centuries. It amalgamated with the 16th The Queen's Lancers to become the 16th/5th Lancers in 1922.
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Performed by the Band of the Royal Lancers.
The image is of 14-year-old Trumpeter Sherlock of the 5th Lancers, who shot three Boers at Elandslaagte, 1899.