The Morale reference article from the English Wikipedia on 24-Jul-2004
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Morale

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Morale measures the degree to which people hold to belief. The term applies particularly to military personnel and to members of sports teams.

Despite the intangible nature of morale, material factors (such as remuneration, food and shelter) can affect it.

In certain role-playing games, characters may have a morale attribute. This usually serves to indicate how long the character will press a difficult fight before giving up or fleeing.