ultimatum

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ultimatum

(ŭl'tĭmā`təm), in international law, final, definitive terms submitted by one disputant nation to the other for immediate acceptance or rejection. Since refusal to accept the terms may lead to war or hostile measures, an ultimatum usually constitutes a conditional declaration of war. An ultimatum is written and indicates how its nonacceptance will be regarded. When a brief time limit is imposed, the crisis becomes more intense, because there is less opportunity for mediation or arbitration. The contracting powers at the second Hague Conference (1907) agreed to begin hostilities only after giving warning. These provisions were superseded by the Covenant of the League of Nations and later by the Charter of the United Nations, which limited the right of states to use war as an instrument of national policy. An ultimatum presented by Austria to Serbia on July 23, 1914, was the immediate cause of World War I. Hitler also presented several ultimatums (to Czechoslovakia and Poland) in the year before the outbreak of World War II. Japan, however, began its war with the United States with an attack rather than an ultimatum.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Ultimatum

 

in international law, a categorical demand expressed either formally in writing or orally and presented by one state to another; it requires the state to which it is presented, within a prescribed period, to assume a certain position on an issue, to take a specific action, or to fulfill some other stated condition. Failure by the recipient of the ultimatum to accede to the demand or demands of the state issuing the ultimatum may result in the latter’s adoption of strong measures against the former. These measures may consist in the breaking off of negotiations in progress, in the severing of diplomatic relations between the disputing states, or in the adoption of sanctions, embargoes, or other kinds of reprisals.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

ultimatum

a final communication by a party, esp a government, setting forth conditions on which it insists, as during negotiations on some topic
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005