First, out of the war came a new body of medical literature that was badly needed.  Incidents to Armies with a Method of Cure by Baron van Swietan, [slide 1997] and Directions for Preserving the Health of the Soldier by Benjamin Rush, January 4, 1746 – April 19, 181,  are only two examples of these new medical studies, as war again provided doctors with outstanding opportunities to examine diseases and wounds freely, without opposition from religious or other public groups which had previously hampered their research efforts.