The 21st (Empress of India's) Lancers was a cavalry regiment of the British Army, raised in 1858
The Commonwealth War Graves Commission has 81 recorded WW1 deaths for the 21st (Empress of India's) Lancers.
LANGHAM, A.E. Lance Corporal, 3099. 21st (Empress of India's) Lancers. Grove Town Cemetery, Meaulte, Somme, France. 23-01-1917. Served in the Indian & Egyptian Campaigns, 1895 & 1898.