While "dual purpose" products such as motorcycles and trucks were an obvious subject for wartime piggy-back advertising/PR images (and are probably most common), weapons were by no means excluded.  This image from Lockheed, extolling the virtues of their products through the example of their P-38 Lightning heavy fighter, is an example of the latter.  Best regards, JR.

Piggy-back advertising (3).

Early WW2 advertising/PR image, this time from Triumph Motorcycles, coming from a slightly different angle.  Patriotism and publicity in one swoop.  Best regards, JR.

Piggy-back advertising (2).

David Low comments on the "unChristian" savagery of the conduct of the Spanish Civil War by the Nationalists and their allies.  Mind you, the Republicans could be just as savage.  And as for the real Moors ... Best regards, JR.