The 3rd New York was a regiment in the Union Army during the American Civil War. Formed in 1861, it was composed primarily of volunteers from New York City and surrounding areas. The regiment played a significant role in several key battles, including the Battle of Gettysburg and the Battle of Antietam. Throughout its service, the 3rd New York was known for its bravery and discipline. The regiment was mustered out in 1863 after sustaining heavy casualties, but its contributions to the war effort were recognized and honored. Many soldiers from the regiment went on to serve in other units or return to civilian life.