Why is the sword displayed pointing to the left?

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An interesting bit of etiquette comes in to play here. Traditionally if a sword is displayed with the handle on the left, blade pointing to the right, it is a sign of peace.
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If the sword were to be drawn from this display, it would have to be drawn with the left hand, which would be difficult for most people, since most are right-handed. The right hand is also recognised as the "sword hand"

If a sword is displayed with the handle on the right, blade pointing to the left, it is a sign of preparedness to meet one's enemies in battle.
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If the sword were to be drawn from this display, it would easily be drawn with the right hand, or "sword hand"

It is not our intention to start a fight, or war, rather to be prepared when a fight comes to us.

"The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government."
~Thomas Jefferson