The 24th Ohio Infantry Regiment was an infantry regiment in the Union Army during the American Civil War. The regiment was known for its daring and professional behavior, often arriving first into the battle and acting as the vanguard in its brigade. In its first battle, the 24th Ohio and the 14th Indiana, with around 300 soldiers fit for duty, defended the Cheat Mountain Summit Fort from around 4,500 Rebels in Anderson's Brigade, Rust's Brigade, and Gen. H. R. Jackson's brigade, leading to a disastrous defeat for Confederate General Robert E. Lee. The regiment played "The Star-Spangled Banner" during the Battle of Shiloh, and lost almost all of its commissioned officers in the Battle of Stones River. The 24th Ohio suffered its only defeat on the battlefield at the Battle of Chickamauga.

Jacob Ammen was a college professor, civil engineer, and a general in the Union Army during the American Civil War. His younger brother, Daniel Ammen, was an admiral in the United States Navy.