Samuel Sprigg "Red" Carroll (September 21, 1832 – January 28, 1893) was a career officer in the United States Army who rose to the rank of brigadier general of the Union during the American Civil War. The Maryland native was most known for his service as the commander of the famed "Gibraltar Brigade," an infantry brigade in the Army of the Potomac that played a key role during the defense of Cemetery Hill during the Battle of Gettysburg, as well as in repulsing a portion of Pickett's Charge. Early life Samuel S. Carroll was born near what is now Takoma Park, Maryland. He was a grandson of Charles Carroll of Bellevue (1767-1823) (a cousin of Charles Carroll, a signer of the Declaration of Independence). He was educated in the local schools, and graduated from College of Saint James (Saint James School), Maryland, and received an appointment to the United States Military Academy in West Point, New York. He graduated 44th of 49 cadets in the Class of 1856 and was brevetted as a second lieutenant in the infantry. He was assigned to frontier duty at a variety of posts in the Old West before returning to West Point as the post's quartermaster. He was married to Miss Helen Bennett in St. Louis, Missouri, on September 3, 1856. Helen was the eldest child of William Bennett, a prominent merchant born in Maryland, and his wife Catherine DuBois. They had three known children. Civil War Carroll was promoted to the rank of captain in the 10th U.S. Infantry shortly after the Civil War erupted. In December 1861, he was appointed as colonel of the 8th Ohio Infantry, a three-years' regiment that exclusively saw duty in the Eastern Theater. During the 1862 Valley Campaign, Carroll commanded the 4th Brigade in James Shields' division. Carroll commanded the vanguard of the Union army at the Battle of Cross Keys. He was commended for his performance at the Battle of Cedar Mountain. Transferred with this brigade to the Northern Virginia area, he was severely wounded in the chest in a fight near the Rapidan River. He recovered in time to resume his field command in III Corps before the Battle of Fredericksburg. In 1863, Carroll commanded the 1st Brigade, 3rd Division of the II Corps at the Battle of Chancellorsville. During the second day at Gettysburg, his 8th Ohio was involved in skirmishing along the Emmitsburg