Portugal was officially neutral during World War II and the period of the Holocaust in German-occupied Europe. The country had been ruled by an authoritarian political regime led by António de Oliveira Salazar but was considered more sympathetic to the Allies than was neighbouring Francoist Spain.
German expansion led to the passage of substantial numbers of refugees, including some Jews, through Portugal in 1939 and 1940. Fearful of the economic and political consequences, the Salazar regime tightened the rules governing the issuance of transit visas by its consuls in November 1939.