Ambrose Burnside was a prominent American military officer during the American Civil War. Born in 1824, he became known for his distinctive facial hair, which led to the term "sideburns." Burnside played a significant role in several key battles, including the Battle of Antietam, where he commanded Union forces. His leadership style was often characterized by his willingness to take risks. Despite his early successes, Burnside faced challenges in later battles, such as the Battle of Fredericksburg, where his forces suffered heavy losses. After the war, he transitioned to a political career, serving as the governor of Rhode Island and later as a U.S. senator.