George Sears Greene (May 6, 1801 – January 28, 1899) was a civil engineer and a Union general during the American Civil War. He was part of the Greene family of Rhode Island, which had a record of distinguished military service to the United States. He first served in the Army from 1823 to 1836 after graduating second from his class at West Point. As a civilian, he was one of the founders of the American Society of Civil Engineers and Architects and was responsible for numerous railroads and aqueduct construction projects in the northeastern United States. After 25 years as a civilian, he rejoined the Army to fight in the American Civil War. Despite his age, he quickly rose up the ranks and was appointed a brigadier general in early 1862. During the war, he took part in the Northern Virginia Campaign, the Battle of Antietam, and the Battle of Chancellorsville. His most notable contribution during the war was his defense of the Union right flank at Culp's Hill during the Battle of Gettysburg. He returned to engineering work after the war until his death in 1899. Early life Greene was born in Apponaug, Rhode Island, one of nine children of Caleb and Sarah Robinson (Greene) Greene. His family had roots in the founding of Rhode Island and in the American Revolutionary War, including General Nathanael Greene, George's second cousin. Caleb was a financially shrewd ship owner and merchant, but the Embargo Act of 1807, which prohibited U.S. vessels from carrying goods to other countries, and the War of 1812 left his family in financial difficulties. Young George attended Wrentham Academy and then a Latin grammar school in Providence and hoped to attend Brown University there, but his impoverished father could not afford it, so he moved to New York City and found work in a dry goods store on Pearl Street. In the New York store, Greene met Major Sylvanus Thayer, superintendent of the United States Military Academy, who recommended him to the Secretary of War for appointment to the academy. Greene entered West Point at age 18 and graduated second of 35 cadets in the class of 1823. Top graduates of the academy generally chose the Engineers as their branch, but Greene decided on the artillery and was commissioned a second lieutenant in the 3rd U.S. Artillery Regiment. However, due to his excellent academic performance, he stayed