5923229 Rissaldar Unoop Singh, 11th Bengal Lancers, 1860s circa (b/w photo) by Unknown photographer, (19th century); National Army Museum, London; (add.info.: Rissaldar Unoop Singh, 11th Bengal Lancers, 1860s circa. Photograph, India, 1860s circa. A Rissaldar was the commander of a risala (mounted troop) and was a rank in the cavalry equivalent to a Subadar in the Indian infantry. They were known as Viceroy\'s Commissioned Officers (VCOs). Unoop Singh is shown here with a young boy, possibly his son. From an album previously owned by General Sir Sam Browne VC, 1857-1870 circa.); by National Army Museum .