 The museum displays collections of military memorabilia and 7000 items, including a collection of 16th through 20th century arms, uniforms, flags, military art and trophies.It holds, for example, the Douglas Arms Collection which was presented to RMC by Walter Douglas (RMC 1890).The Douglas Arms Collection contains over 400 guns that were originally in the ownership of Mexican President, General Porfirio Diaz.