Secret War in Portugal [1939-1945]
For SOE [British Special Operation Executive] 24 Land was the code name for Portugal

Grande Exposição do Mundo Português (1940)

1940. Europe at war. Neutral Portugal opened the doors to the Portuguese World Exhibition. The country was celebrating the centenaries, 1140, 1640, 1940. It was the fundamental year for the régime. The British Crown tributed the due respect at the highest level, by the presence of the Duke of Kent. We were not visited by Hitler or Mussolini. This means something, I am sure.
The documentary was filmed by António Lopes Ribeiro [see more here, in Portuguese].