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

"A Revolução de Maio"

Directed by António Lopes Ribeiro [see here for more], this is a film [full version] produced in 1937 about the 28 May Revolution 1926 that created te Estado Novo. The 1st Republic came to its end.