Bill Trainor was an Earthforce officer who served on the EAS Alexander.
In 2260, the ship was in a battle during the early stages of the Earth Alliance Civil War, in which General William Hague was killed, Major Ed Ryan took command, and Trainor became the first officer. Trainor encouraged Ryan to decide to use the ship's main guns against the EAS Clarkstown since they were not going to back down and continued to pursue the ship.[1]