Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. With the outbreak of the Civil War in the spring of 1861, President called for volunteers from each state. In April, recruiters quickly filled the quota for a number of regiments in the state of , with two regiments enlisting for 3-months, including the and the 2nd Ohio. Mustering in at on April 18, 1861, the 1,000-man regiment was under the command of Lewis Wilson. It soon embarked on trains for , where it served in the fortifications surrounding the capital until July. It was then attached to 's Brigade, Tyler's Division, 's . On July 16, the regiment marched to , then the next day occupied Fairfax Courthouse. It participated in the fighting at the on July 21. It retreated to Washington following General McDowell's stunning defeat. When the 3-month term of enlistment expired, the regiment mustered out July 31, 1861.