National Defense Magazine was founded in July 1920 as Army Ordnance magazine by the Army Ordnance Association, which later became the American Defense Preparedness Association. The idea came from the need to provide a platform for discussing military technology and preparedness issues. In 1997, the magazine was rebranded as National Defense Magazine when the American Defense Preparedness Association merged with the National Security Industrial Association to form the National Defense Industrial Association (NDIA). Today, National Defense Magazine is owned and operated by NDIA, a non-profit, non-partisan organization. Based in Arlington, Virginia, National Defense Magazine covers a wide range of topics related to national security and defense. This includes defense programs, policy, business, science and technology, military tactics, doctrine, and strategy. The magazine provides in-depth coverage of defense budgets, emerging technologies, global defense markets, and homeland security issues. **One interesting fact**: Despite being a relatively young publication when it started, National Defense Magazine quickly grew into a major defense news source. At its peak in the 1950s, the Register System of Newspapers, which included National Defense Magazine (then called Army Ordnance) and its diocesan editions, reached a combined circulation of over 700,000 readers.