The Military fiat reference article from the English Wikipedia on 24-Apr-2004
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Military fiat

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Military fiat is a process whereby a decision is made and enforced by military means without the participation of other political elements. The Latin term fiat, loosely translated as "let there be," suggests the autocratic attitude ascribed to such a process. For example, many coupss involve the imposition of a new government by military fiat.

see also fiat money