query: When was the Battle of Gettysburg?
passage: Battle of Gettysburg
The Battle of Gettysburg (locally /ˈɡɛtɪsbɜːrɡ/(listen))[11] 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.[12][13] 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.
passage: Charles Coster
Maj. Gen. Oliver Otis Howard kept von Steinwehr's division in reserve on the first day of the Battle of Gettysburg, July 1, 1863, positioning it on Cemetery Hill. When the Union right flank north of town began to collapse, Howard permitted von Steinwehr to send Coster's brigade to cover its retreat. These Union troops took a position just north of the town, where they were deployed in a brickyard. The brigade was attacked by superior forces from the Confederate division of Maj. Gen. Jubal Early. Coster's brigade lost most of its 597 casualties in that action. The remainder of the brigade spent the next two days supporting batteries on Cemetery Hill. Howard commended Coster and other senior commanders by name for their courage and devotion to duty in his report on Gettysburg.