In April 1861 Federal units and state regiments were attacked as they marched through Baltimore, sparking the Baltimore riot of 1861, the first bloodshed in the Civil War. Of the 115,000 men from Maryland who joined the military during the Civil War, 85,000, or 77%, joined the Union army, while the remainder joined the Confederate Army. The largest and most significant battle in the state was the Battle of Antietam on September 17, 1862, near Sharpsburg. Although a tactical draw, the battle was considered a strategic Union victory and a turning point of the war.