James Harrison Wilson

James Harrison Wilson was an American military officer, topographic engineer and a Major General in the Union Army during the American Civil War. He initially served as an aide to Major General George B. McClellan during the Maryland Campaign before joining Major General Ulysses S. Grant's army in the Western Theater, where he was promoted to brigadier general. In 1864, he transferred from engineering to the cavalry, where he displayed notable leadership in many engagements of the Overland Campaign. However, his attempt to destroy Lee’s supply lines failed when he was routed by a much smaller force of Confederate irregulars.