Sandy Cotton was a human non-commissioned officer that served as a MACO soldier during the 2150s and 2160s. She was a front lines soldier in the Earth-Romulan War, before being transferred to the starship Poseidon. (Star Trek: Poseidon - The Birth of the Federation) Born in London on Earth, Cotton was raised in a family of soldiers. Her father was a MACO officer, his father had served with the Royal Marines as a commando. Naturally, her choice of career came as no suprise to her family.