The Robert R. McCormick Research Center has a wide range of materials that cover U.S. military history and specifically the 1st Infantry Division. This would include general military histories, unit histories, reference books, periodicals, official records, and donated materials such as diaries, memoirs, letters and photos from veterans. The RRMRC is a non-circulating facility whose stacks are closed to the public. Researchers may use all materials in the reading room with the help of RRMRC staff. Appointments are strongly suggested. For those who can not come to the museum, research requests may also be made by phone, mail or e-mail. The RRMRC is open during regular museum hours, Tuesday through Friday.