The National Defense Industrial Association (NDIA) is a trade association for the United States government and defense industrial base.^[1][2] It is an 501(c)(3) educational organization. Its headquarters are in Arlington, Virginia. NDIA was established in 1919 as a result of the inability of the defense industry to scale up the war effort during World War I.^{[citation needed]}

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National Defense Industrial Association

Abbreviation	NDIA
Formation	1919
Type	Voluntary Association
Headquarters	Arlington, Virginia
Location	United States
Membership	Corporate, Individual, Small Business, and Life
President and CEO	David Norquist
Affiliations	Association For Enterprise Integration (AFEI) National Training and Simulation Association (NTSA) Precision Strike Association (PSA) Women in Defense (WID)
Staff	75
Website	NDIA.org

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In 1917, Brigadier General Benedict Crowell^[3] was called to active duty and served on the General Munitions Board. As a board member, he established a relationship with the steel industry and was almost immediately appointed Assistant Secretary of War and Director of Munitions. As Director of Munitions, Crowell was a significant catalyst in improving the country's capability to produce arms and ammunition. However, he recognized the nation's need for an association that fostered cooperation between civilian industry and government in support of industrial preparedness. He founded the Army Ordnance Association (AOA) in 1919 and served as president for its first 25 years. Over the ensuing decades, AOA became the American Defense Preparedness Association (ADPA), which then merged with the 1944 National Security Industrial Association (NSIA) in 1997, creating NDIA.

NDIA currently publishes National Defense Magazine, Weekly Policy Digest, Weekly Defense Insider, and Monthly Defense Watch.

NDIA has 29 chapters located throughout the United States.^[5]

NDIA consists of subject-specific divisions that aim to promote defense and national security through access, influence, and education.^[6]

NDIA has 5 industrial committees and working groups that bring government and industry personnel together on important topics.

• Military–industrial complex
• National defense
• Warfighter