5924592 Indian cavalrymen watering their horses during the Delhi Camp of Exercise, 1885 circa (b/w photo) by Unknown photographer, (19th century); National Army Museum, London; (add.info.: Indian cavalrymen watering their horses during theCamp of Exercise, 1885. Photograph, India, 1885. The Camp of Exercise held in the neighbourhood of Delhi and Umballa during 1885-1886 was the largest gathering of troops in peacetime India up to that date. Four divisions, comprising fourteen cavalry and 36 infantry regiments, British and Indian, took part and 37,000 troops and 25,000 followers were involved. From an album of 82 photographs.); by National Army Museum .