President George Washington’s original cabinet contained just four departments and department heads: Department of State, which was led by inaugural Secretary Thomas Jefferson, Department of the Treasury, which was conceived and headed up by Alexander Hamilton, Attorney General Edmund Randolph, and the Department of War, which was first led by distinguished Continental Army General Henry Knox. The War Department existed until 1947, when it was initially split into the Department of the Army, the Department of the Air Force, and the Department of the Navy. Congress had previously established a Department of the Navy in 1798, which was under the...