Anglo-Portuguese Treaty of 1373 Anglo-Portuguese Treaty of 1373 The Anglo-Portuguese Treaty of 1373 was signed on 16 June 1373 between King Edward III of England and King Ferdinand and Queen Eleanor of Portugal. It established a treaty of "perpetual friendships, unions [and] alliances" between the two seafaring nations. It is the oldest active treaty in the world. It was confirmed "with my usual flourish" by John de Banketre, Clerk. It was reinforced throughout history, including in 1386, 1643, 1654, 1660, 1661, 1703, 1815 and by a secret declaration in 1899. It was recognized in the Treaties of Arbitration in the 20th century between Britain
Indo-Soviet Treaty of Friendship and Cooperation or public, with one or more States, which is incompatible with this Treaty. Each High Contracting Party further declares that no obligation be entered into, between itself and any other State or States, which might cause military damage to the other Party. This Treaty is concluded for the duration of twenty years and will be automatically extended for each successive period of five years unless either High Contracting Party declares its desire to terminate it by giving notice to the other High Contracting Party twelve months prior to the expiration of the Treaty. The Treaty will be subject to ratification