US Battleships are, by law, named after states, except for US Ship (USS) Kearsarge which was used during the American civil war. It was named after a mountain in Merrimack County by an act of the US Congress.

The USS Kearsarge holds a distinguished place in American naval history, renowned for its pivotal role during the American Civil War and its unique nomenclature, diverging from the traditional naming conventions of U.S. battleships.

Commissioned in 1861, the USS Kearsarge gained widespread recognition through its historic encounter with the Confederate commerce raider CSS Alabama off the coast of Cherbourg, France, in June 1864. Under the command of Captain John A. Winslow, the Kearsarge engaged the Alabama in a legendary naval battle that captured the world's attention.

The battle between the Kearsarge and the Alabama marked a crucial moment in naval warfare, showcasing the significance of advanced naval technology, tactics, and skill. The Kearsarge emerged victorious, significantly contributing to the Union's naval dominance during the Civil War and symbolizing a critical turning point in the conflict.

The USS Kearsarge's unique name stems from a mountain in Merrimack County, New Hampshire. The choice to deviate from the standard practice of naming U.S. battleships after states was a deliberate act by the U.S. Congress. The mountain, located in Warner, New Hampshire, and rising about 2,937 feet (895 meters) above sea level, holds historical significance in the region and served as the inspiration for the ship's name.

The decision to name the vessel after the mountain represented a departure from tradition and honored a local geographic landmark, marking a distinctive chapter in the annals of U.S. naval history.

Beyond its name, the legacy of the USS Kearsarge endures as a symbol of valor, resilience, and naval prowess, reflecting the unwavering commitment and sacrifice of those who served aboard her during a tumultuous period in American history. The ship's notable contributions during the Civil War solidified its place in maritime history and earned it a revered status among naval enthusiasts and historians alike.