George Leonard Andrews
George Leonard Andrews was an American professor, civil engineer, and soldier. He was a Brigadier General in the Union Army during the American Civil War and was awarded the honorary grade of brevet Major General.
George Andrews was born in Bridgewater, Massachusetts, son of Manasseh and Harriet Leonard Andrews. In 1851, Andrews graduated first in his class from the United States Military Academy at West Point. After graduating, he was assigned to the Army Corps of Engineers with the rank of brevet second lieutenant. From 1851 to 1854, he served as assistant to Lt. Col. Sylvanus Thayer who was in command of the construction of Fort Warren in Boston harbor. From 1854 to 1855, he was assistant professor of engineering at West Point. He then resigned from the service and was engaged in civil engineering work until the beginning of the Civil War. Some sources have confused General Andrews with Colonel George Lippitt Andrews, U.S. Army .
Source: Wikipedia