Battle of Gettysburg
The Battle of Gettysburg () was fought July 1–3, 1863, in and around the town of Gettysburg, Pennsylvania, by Union and Confederate forces during the American Civil War. The battle involved the largest number of casualties of the entire war and is often described as the war's turning point. Union Maj. Gen. George Meade's Army of the Potomac defeated attacks by Confederate Gen. Robert E. Lee's Army of Northern Virginia, halting Lee's invasion of the North.
John F. Chase
Two months after earning the Medal of Honor at Chancellorsville, Chase participated in the Battle of Gettysburg. The 5th Maine Battery was a part of General John F. Reynolds' I Corps and fought at Seminary Hill on the first day of the battle, July 1, 1863. As the Confederates advanced, the corps fell back past the town of Gettysburg, with Chase's battery taking up a position on a knoll between Culp's Hill and Cemetery Hill. On the battle's third day, July 3, the Confederates launched an assault on Cemetery Hill. Chase's battery fired with devastating effect on the attacking infantry, and in response, three or four Confederate batteries began targeting the 5th Maine's position.