First for the Union

The Army of the Potomac’s First Corps was one of the best corps in the entire Union army. In September 1862, it was chosen to spearhead the Union attack at Antietam, fighting Stonewall Jackson’s men in the Cornfield and at the Dunker Church. In July 1863 at Gettysburg, its men were the first Union infantry to reach the battle, where they relieved the cavalry and fought off the Confederate onslaught all day before retreating to Cemetery Hill. Their valiant stand west of Gettysburg saved the Union