George Dupont was raised in Siam but came to the United States in 1859. He was living in Jersey City, New Jersey working as a type founder when he enlisted into Company B of the 13th New Jersey Volunteers in August 1862. He fought with the regiment during the American Civil War at Antietam, Chancellorsville, and Gettysburg. He was hospitalized due to sickness during the summer and fall of 1863. He was severely wounded at the Battle of Kolb's Farm on June 22, 1864 and spent the next year in a hospital. He was discharged from the Union Army on June 26, 1865. He was living in Philadelphia, Pennsylvania when he was naturalized as an American citizen on August 2, 1869. He was issued a passport soon after and returned to Siam sometime in 1870. He worked for an English language newspaper in Bangkok, as a drill master for the Siamese Army (due to his military experience in the American Civil War), and as a timber dealer. He was working as a timber dealer when he was attacked by thieves in 1889 and shot through both feet. Because of his injuries he worked through the U.S. Consular General and applied for and received a pension due to his military service. He died in Bangkok of heart disease on July 18, 1900 and is buried in Grave 720. His actual age is unknown. Records indicate that he could have been born anywhere between 1844 and 1846. He may be the only known native Siamese to fight in the American Civil War.