Joseph King Fenno Mansfield (December 22, 1803 – September 18, 1862) was a career U.S. Army officer, civil engineer, and a Union general in the American Civil War, mortally wounded at the Battle of Antietam. December 22 is the 356th day of the year (357th in leap years) in the Gregorian Calendar. ... 1803 was a common year starting on Saturday (see link for calendar). ... September 18 is the 261st day of the year (262nd in leap years). ... 1862 - Wikipedia /**/ @import /skins/monobook/IE50Fixes. ... The Army is the branch of the United States armed forces which has primary responsibility for land-based military operations. ... The Union Army refers to the United States Army during the American Civil War. ... The American Civil War was fought in the United States from 1861 until 1865 between the United States – forces coming mostly from the 23 northern states of the Union – and the newly-formed Confederate States of America, which consisted of 11 southern states that had declared their secession. ... Battle of Antietam Conflict American Civil War Date September 17, 1862 Place Near Sharpsburg, Maryland Result (Union strategic victory) The Battle of Antietam (known as the Battle of Sharpsburg in the South), fought on September 17, 1862, near Sharpsburg, Maryland, part of the Maryland Campaign, was a battle in the...