Silas Titus enlisted on May 13, 1861, as a
first lieutenant and was commissioned into the Field and Staff of the
12th New York State Volunteers (also known as the "First Onondaga Regiment"). Titus served as the regimental
adjutant. By September 1861, he had been transferred to the staff of
Brig. Gen. John J. Peck, who commanded a
brigade in the guarding of
Chain Bridge and
Tennallytown, Washington, D.C., before being promoted to commanding
colonel of the
122nd New York - Third Onondaga Regiment on August 22, 1862. The regiment was rushed to
Washington to prepare to advance on the Confederacy. At 4 o'clock the morning following the 12th NY's arrival in Washington, President
Abraham Lincoln and
U.S. Secretary of State William Seward drove out to the camp of the 12th in a carriage. The President personally thanked the officers of the 12th New York, saying, "I'm glad to see you here boys". He then shook the hand of every soldier in the regiment. In July 1862, Titus took a leave of absence due to poor health and returned to his home in Syracuse. While he was recovering at home, he was appointed colonel of the newly formed 122nd New York State Volunteer Regiment by the governor of New York. The 122nd regiment joined the Army of the Potomac in September 1862 at
Sharpsburg on the final day of the
Battle of Antietam. Three months after Antietam, with Titus in command, the 122nd found themselves supporting the Pennsylvania Reserves in
the assault on Fredericksburg Heights. The regiment spent four hours under artillery fire with only four men wounded at the end of the day. In the summer of 1863, the 122nd New York was part of the First Brigade, Third Division, Sixth Corps. The night of July 1, the 6th Corps marched from Manchester along the
Baltimore Pike towards Gettysburg. As the regiment crossed the Pennsylvania - Maryland line, the regimental flag unfurled to the breeze and the drum corps played "
Yankee Doodle". During the war, Titus was a regular correspondent to the Syracuse
Daily Courier & Union newspaper, where, under the nom de plume
Scimetar, he wrote several lively letters concerning the war under the heading 'On the Warpath'. ==Postbellum activities==