called east to reinforce General John Pope's Army of Virginia at the Second Battle of Bull Run. Delayed in passing through Washington, D.C., the 23rd Ohio did not arrive in time for the battle but joined the Army of the Potomac as it hurried north to cut off Robert E. Lee's Army of Northern Virginia as it advanced into Maryland. The 23rd was the first regiment to encounter the Confederates at the Battle of South Mountain on September 14. After severe losses, Union forces drove back the Confederates and continued to Sharpsburg, Maryland, where they engaged Lee's army at the Battle of Antietam, one of the bloodiest battles of the war. The 23rd was in the thick of the fighting at Antietam, and McKinley came under heavy fire when bringing rations to the men on the line. McKinley's regiment suffered many casualties, but the Army of the Potomac was victorious and the Confederates retreated into Virginia. McKinley's regiment was detached from the Army of the Potomac and returned by train to western Virginia. Shenandoah Valley and promotion While the regiment went into winter quarters near Charleston, Virginia (present-day West Virginia), McKinley was ordered back to Ohio with some other sergeants to recruit fresh troops. When they arrived in Columbus, Governor David Tod surprised McKinley with a commission as second lieutenant in recognition of his service at Antietam. McKinley and his comrades saw little action until July 1863, when the division skirmished with John Hunt Morgan's cavalry at the Battle of Buffington Island. Early in 1864, the Army command structure in West Virginia was reorganized, and the division was assigned to George Crook's Army of West Virginia. They soon resumed the offensive, marching into southwestern Virginia to destroy salt and lead mines used by the enemy. On May 9, the army engaged Confederate troops at Cloyd's Mountain, where the men charged the enemy entrenchments and drove the rebels from the field. McKinley later said the combat there was "as desperate as any witnessed during the war". Following the rout, the Union forces destroyed Confederate supplies and skirmished with the enemy again successfully. McKinley and his regiment moved to the Shenandoah Valley as the armies broke from winter quarters to resume hostilities. Crook's corps was attached to Major General David Hunter's Army of the Shenandoah and soon back in contact with Confederate forces, capturing Lexington, Virginia, on June 11. They continued south