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331:"I have an announcement", I said, "to make to the House arising out of the treaty signed between this country and Portugal in the year 1373 between His Majesty King Edward III and King Ferdinand and Queen Eleanor of Portugal." I spoke in a level voice, and made a pause to allow the House to take in the date, 1373. As this soaked in there was something like a gasp. I do not suppose any such continuity of relations between two Powers has ever been, or will ever be, set forth in the ordinary day-to-day work of British diplomacy.
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faithful princes, they shall henceforth reciprocally be friends to friends and enemies to enemies, and shall assist, maintain, and uphold each other mutually, by sea and by land, against all men that may live or die of whatever degree, station, rank, or condition they may be, and against their lands, realms, and dominions.
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here shall be between the respective kings and their successors, their realms, lands, dominions, provinces, vassals, and subjects whomsoever, faithfully obeying, true, faithful, constant, mutual, and perpetual friendships , unions , alliances , and leagues of sincere affection ; and that, as true and
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It was reinforced throughout history, including in 1386, 1643, 1654, 1660, 1661, 1703, 1815, and by a secret declaration in 1899. It was recognised in the
Treaties of Arbitration in the 20th century between Britain and Portugal in 1904 and 1914.
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The 650th anniversary of the treaty was officially commemorated by the governments of both nations on 16 June 2023, and in acknowledgement that this represents "the world's longest diplomatic alliance".
517:"In a paper Dr Siobhan Talbott has argued the Franco-Scottish Auld Alliance of 1295 survived centuries of enmity and war between Britain and France – even after the Act of Union was signed in 1707"
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of "perpetual friendships, unions alliances" between the two seafaring states. It is the oldest continuous treaty in effect to this day. It was signed just a few years after the
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466:"Making an Alliance Last in an Age of Conflicts: Obligations and Deterrence in the Medieval Anglo-Portuguese Treaties"
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from 1580 to 1640, when the monarchies of Spain and
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619:. Vol. 3 (third ed.). London: Holmes. pp. 8–9.
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383:"Closing the Ring", Churchill, Sir Winston Spencer, 1951.
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language. A famous passage in the treaty assures that:
588:. House of Commons. 12 October 1943. col. 716.
51:. Unsourced material may be challenged and removed.
440:"The Beginnings of the Anglo-Portuguese Alliance"
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