Theresa, I do not recall a Martin's Battery as a part of the Fort Gaines garrison when it was captured in August 1864. Colonel Charles D. Anderson, 21st Alabama Infantry, commanded Fort Gaines. Six companies of Anderson's regiment and two companies of the 1st Alabama Artillery Battalion, some 400 men, made up that garrison. I'd have to double check, but I do not think a Captain Martin commanded any of the companies in these units. About 200 reserves, local defense troops, and marines reached the fort from Mobile just before Farragut’s squadron ran into the bay, but I do not have any information on what specific units might have been in this reinforcement.