Napoleon demanded they support his economic blockade by closing their ports to British shipping [b] but their economy was dependent on trade with Brazil.

[4] Stuart captured the Spanish island of Menorca in 1798, previously occupied by Britain from 1708 to 1782 and whose recovery was the major achievement of Spain's participation in the 1778-1783 Anglo-French War.

There was also limited action in South America where Spain and Portugal had been arguing for 300 years over the delineation of borders in the Río de la Plata region.

A Spanish attempt to seize Mato Grosso in modern Brazil was repulsed while the Portuguese captured the Misiones Orientales, allocated to Spain in 1778.

[8] Portugal also agreed to close its ports to British shipping, pay an indemnity of 20 million francs and allow the import of French woollens.

However, Napoleon refused to ratify the Treaty, claiming Lucien Bonaparte who signed it and his Foreign Minister Talleyrand who agreed to the terms had both been bribed by the Portuguese.

[11] In 2003, José Ribeiro e Castro, a Portuguese MEP raised the matter with the Council of Europe but while it remains an issue, it has not disrupted relations between the countries.