The first Alabama was a 74-gun ship of the line, started in 1818, though never completed as such. She was eventually launched in 1864 as the storeship New Hampshire.
The first ship completed as Alabama was a 56 ton Revenue Cutter built at New York in 1819. She captured more than a dozen slavers and pirates, and sold off in 1833.
The second Alabama was the first US Navy ship christened Alabama. She was a sidewheel steamer transferred to the Navy in 1849 that served as a troop transport during the Mexican-American War.
The third Alabama was a sidewheel steamer merchant vessel that was commissioned in 1861 during the American Civil War. She served as a troop and cargo transport.