Understated cooperation

Brazil, Scott 632, 1945, 37mm x 29mm
Here is another World War II commemorative masquerading as something celebrating international trade or something like that.

If one looks very closely at the destinations highlighted on this – Miami, Port [au] Prince, Puerto Rico, Trinidad, Georgetown, Belém, Fortaleza, Natal [Rio Grande do Norte], Ascencion, Accra, Khartoum, and Cairo – tiny little aircraft symbols oriented west to east can be seen. This represents the route of a major troop transport mission between the U. S. and the various war fronts:

[T]he huge Parnamirim field at Natal became the focal point in the Allied air transport system that ran west then north through Belém and the Guianas, across the Caribbean to Miami, and east over the Atlantic via Ascension Island and across Africa to the China-Burma-India theater.

Who knew? And who looking at this staid issue with its modest title and no especial emphasis on the battle front would have made the connection even back then?