On September 24, 1864, Hyde transferred to the 1st Maine Veteran Volunteer Infantry Regiment and was promoted to Colonel on October 22, 1864.[3] Hyde commanded Brigade 3, Division 2, VI Corps of the Army of the Shenandoah between October 30, 1864, and December 6, 1864, and the same brigade in the Army of the Potomac from December 6, 1864 (when the Army of the Shenandoah returned from its detached duty to the Army of the Potomac) until June 28, 1865.[3] Despite this service, Hyde did not receive promotion to full rank brigadier general.[3][4]
On January 13, 1866, PresidentAndrew Johnson nominated Hyde for appointment as a brevet Brigadier General of volunteers to rank from April 2, 1865 and was confirmed by the U.S. Senate to the appointment on March 12, 1866.[6] On February 17, 1869, President Johnson nominated Hyde for the brevet grade of Major General of volunteers, to rank from April 2, 1865, and was confirmed by the U.S. Senate to the appointment on March 3, 1869, one of the last brevet Major General awards for Civil War service.[7]
Starting in 1873, Hyde served three terms in the Maine Senate, including two as president. He became mayor of Bath, Maine in 1878.
In 1884, he founded Bath Iron Works and became general manager of it in 1888. Since it was founded, the shipyard has executed more than 425 shipbuilding contracts, including 245 for the U.S. Navy.
Rank and organization: Major, 7th Maine Infantry. Place and date: At Antietam, Md., 17 September 1862. Entered service at: Bath, Maine. Birth: Italy. Date of issue: 8 April 1891. His citation read:
Led his regiment in an assault on a strong body of the enemy's infantry and kept up the fight until the greater part of his men had been killed or wounded, bringing the remainder safely out of the fight.[3]