sentences:  He was promoted to colonel on April 22, 1864.On December 11, 1866, President Andrew Johnson nominated Brewerton for appointment to the grade of brevet brigadier general in the regular army, to rank from March 13, 1865, and the United States Senate confirmed the appointment on February 23, 1867.Brewerton retired on March 7, 1867, 12 days after his appointment as a brevet brigadier general was confirmed by the US Senate, after more than 47 years active service, not including his almost 6 years as a cadet at West Point.