5922772 Indian Army infantry on the march, Delhi Camp of Exercise, 1885 (b/w photo) by Unknown photographer, (19th century); National Army Museum, London; (add.info.: Indian Army infantry on the march during the Delhi Camp 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. The exercise lasted a month and culminated in a review of the troops From a photograph album of 82 photographs.); by National Army Museum .