According to recently discovered documents at the British National Archives in London, British scientists tested the effects of mustard gas on Indian soldiers for over a ten-year period. Beginning in the early 1930s, scientists at Rawalpindi sent Indian soldiers, wearing only shorts and cotton shirts, into gas chambers to experience the effects of mustard gas. The scientists hoped to determine the appropriate dosage to use on battlefields. Many of the subjects suffered severe burns from their exposure to the gas. No long term effects of exposure were documented or studied.