National defense is a nation's use of military, economic and political power to maintain survival.

Look up national, defense, or defence in Wiktionary, the free dictionary.

National defense or national defence may also refer to:

• National Defense (Poland), a volunteer military formation of the Second Polish Republic
• National Defense (magazine), a business and technology magazine published by the National Defense Industrial Association
• National missile defense, a military strategy to shield a country from missiles
• Movement of National Defence, a Greek government during WWI

• Ministry of defence, part of a government responsible for matters of defence
• National security (disambiguation)
• Defense (disambiguation)
• National Defence Academy (disambiguation)
• National Defence University (disambiguation)

This disambiguation page lists articles associated with the title National defense.
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