バレー方面作戦
The 75th was initially sent to augment the Union forces in the Shenandoah Valley region of Virginia. It soon participated in defending what became known as Stonewall Jackson's Valley Campaign. On May 8, 1862, at the Battle of McDowell, the regiment lost 87 men. It fought again at Cross Keys before being sent eastward to reinforce the Union troops after the Peninsula Campaign.