On 9 August, at the Battle of Cedar Mountain, the regiment was again at the front and engaged in a fierce hand-to-hand conflict. Of the three hundred men engaged, only one hundred escaped unhurt. The Seventh suffered more than any other Union regiment in this battle. On 21 August, the men experienced a brief engagement at Snicker's Gap. During the subsequent campaign, which lasted until 2 September and culminated in the Second Battle of Manassas, the Seventh was held in reserve guarding the railroads.