The document summarizes several major battles and events of the American Civil War in 1862. Ulysses S. Grant emerged as an effective Union general in the Western Theater, winning victories at Fort Henry and Shiloh. In the Eastern Theater, the Seven Days Battles resulted in a Confederate victory near Richmond, though the Union captured New Orleans and gained control of the Mississippi River. The bloodiest single-day battle of the war, Antietam, resulted in a Union victory but allowed Robert E. Lee's Army of Northern Virginia to escape.