The 70th New York Infantry Regiment was one of five infantry regiments formed by former U.S. Congressman Daniel Sickles and established as part of the Excelsior Brigade which fought with the Union Army during multiple key engagements of the American Civil War, including the Chancellorsville, Gettysburg and Overland campaigns. Leaders from the 70th New York recruited men from New Jersey, as well as from cities and small towns across the State of New York.

Daniel Edgar Sickles was an American politician, soldier, and diplomat.