troops to withdraw to the forks of Middle Creek, on the road to Virginia, and Garfield ordered his troops to take up the pursuit. They attacked the rebel positions on January 9, 1862, in the Battle of Middle Creek, the only pitched battle Garfield commanded personally. At the fighting's end, the Confederates withdrew from the field and Garfield sent his troops to Prestonsburg to reprovision. In recognition of his success, Garfield was promoted to brigadier general. After Marshall's retreat, Garfield's command was the sole remaining Union force in eastern Kentucky and he announced that any men who had fought for the Confederacy would be granted amnesty if they returned to their homes, lived peaceably, and remained loyal to the Union. The proclamation was surprisingly lenient, as Garfield now believed the war was a crusade for eradication of slavery. Following a brief skirmish at Pound Gap, the last rebel units in the area were outflanked and retreated to Virginia. Garfield's promotion gave him command of the 20th Brigade of the Army of the Ohio, which received orders to join Major General Ulysses S. Grant's forces as they advanced on Corinth, Mississippi, in early 1862. Before the 20th Brigade arrived, however, Confederate forces under General Albert Sidney Johnston surprised Grant's men in their camps, driving them back. Garfield's troops received word of the battle and advanced quickly, joining the rest of the army on the second day to drive the Confederates back across the field and into retreat. The action, later known as the Battle of Shiloh, was the bloodiest of the war to date; Garfield was exposed to fire for much of the day, but emerged uninjured. Major General Henry W. Halleck, Grant's superior, took charge of the combined armies and advanced ponderously toward Corinth; when they arrived, the Confederates had fled. That summer, Garfield suffered from jaundice and significant weight loss. He was forced to return home, where his wife nursed him back to health. While he was home, Garfield's friends worked to gain him the Republican nomination for Congress, but he refused to campaign with the delegates. He returned to military duty that autumn and went to Washington to await his next assignment. During this period of idleness, a rumor of an extramarital affair caused friction in the Garfields' marriage until Lucretia eventually chose to overlook it. Garfield repeatedly received tentative assignments that were quickly withdrawn, to his frustration.