The Alliance between England and Portugal is the oldest alliance in the world which is still in force. This is not at all related to the fact that England is very fond of Portuguese Port wine, in spite of the significant investment in vineyards by English immigrants during the 19th century in the district of O’Porto. To understand this alliance, we must go further back, all the way into the 14th century, and look into Portuguese, English and Castilian politics.
From the Ancient World to Queen Victoria
The Historian Chronicles 