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In military science, defense (or defence) is the art of preventing an attack, or minimizing the damage of an attack, e.g. by preventing an enemy from conquering territory.

Thus, if a party attacks an enemy who is about to attack that party, this could be called defense. However, this leaves room for interpretation.

Typically defensive are e.g. armour and a bunker. Also defensive are guns, rockets, etc. with a range within the party's territory: they can only attack an attacker. If the weapon is mobile it may also be used in an attack, after moving it.

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News Release - U.S. Dept. of Defense

DOD Evaluates Sexual Harassment & Violence Programs At Military Service Academies
Fri, 18 Dec 2009 00:00:00 -0500
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General Officer Announcement
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Joint Statement from Secretary Gates and Secretary Clinton on Defense Appropriations
Fri, 18 Dec 2009 00:00:00 -0500
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Army Announces Force Structure Actions
Thu, 17 Dec 2009 00:00:00 -0500
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General Officer Assignments
Thu, 17 Dec 2009 00:00:00 -0500
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Army Announces Force Structure Actions at Fort Lewis, Wash.
Thu, 17 Dec 2009 00:00:00 -0500
News Releases are official statements of the Department of Defense.

Press Advisories - U.S. Dept. of Defense

04/26/2006-Circus Performers Join DoD for "Bring Our Daughters and Sons to Work Day" Event
Wed, 26 Apr 2006 00:00:00 -0000
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04/25/2006-Senior Defense Officials Discuss U.S. Military Realignment in Japan
Tue, 25 Apr 2006 00:00:00 -0000
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04/20/2006-1st Brigade, 101st Airborne Division Commander to Brief Live from Iraq
Thu, 20 Apr 2006 00:00:00 -0000
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04/13/2006-Commander of 3rd Corps Support Command to Brief Live From Iraq
Thu, 13 Apr 2006 00:00:00 -0000
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04/06/2006-1st Brigade, 101st Airborne Division Commander to Brief Live from Iraq
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