Introduction to important departments: The Joint Chiefs of Staff, known as the "soul of the Ministry of Defense", is on the second floor. This floor is covered with golden carpets and is known as the "Golden Hall." The Office of the Secretary of Defense and the Department of the Army are on the third floor. There is the "Hall of Heroes" in the corner of the corridor on the third floor, which was established to commemorate the recipients of the "Highest Medal of Honor" since the Revolutionary War. There are more than 3,000 bronze medals engraved with the names, birthplaces and resumes of the heroes, as well as Marshall and Eisen. ·The "Memorial Corridor" of Marshals Howell and MacArthur displays their photos, military uniforms, medals, pistols, documents signed by them, and cultural relics from various periods. The Department of the Navy and the Air Force are located above the third floor. department.