Methuen Treaty Brazilian economist Celso Furtado, in his work "Brazilian Economic Foundation". At the start of the War of Spanish Succession Portugal was allied with France. As part of this treaty the French had guaranteed the Portuguese naval protection. In 1702, the English navy sailed close to Lisbon on the way to and from Cadiz, proving to the Portuguese that the French could not keep their promise. They soon began negotiations with the Grand Alliance about switching sides. There were actually two Methuen Treaties. Both were negotiated for England in Lisbon by John Methuen ( 1650–1706), who served as a member of
Treaty of Alliance (1778) insurance policy for France which guaranteed the support of the United States if Britain were to break the current peace they had with the French, "either by direct hostilities, or by (hindering) her commerce and navigation," as a result of the signing of the Treaty of Amity and Commerce. The treaty lays out the terms and conditions of this military alliance, establishes requirements for the signing of future peace treaties to end hostilities with the British, and provides a secret clause which leaves open the possibility of Spain and other European nations, "who may have received injuries from England," to