The museum was first established in 1960, in a building that was used as a riding school. In the 1970's it was transferred to a building serving as the Chelsea Hospital. During World War II, the building was severely damaged.
The museum sports a permanent exhibition of soldiers' letters from the battlefield as well as a review of the soldiers' wives stories. The temporary exhibitions display various war tools, spears and swords, ranging all the way to cannons and modern weapons.
At present day the National Army Museum is subsidized by the Department of Defense. At the end of each first week of the month, special events are held at the museum, which includes activities in cooperation with older soldiers after service, activities for children, lectures and various demonstrations.