The 1958 Cuba Gran Prix, the one where Fangio was kidnapped and held for ransom? Yeah, that one.
Well, the Cubans had hosted the Miami Police Dept exhibition squad earlier that year, but seized the Harleys instead of shipping them back to Miami.
So, when the 58 GP happened, there were plenty of stolen Harleys being ridden by Castro's goon squad of security
Here's an example of the ridiculous military of Castro hanging around the pits of the GP
Just what enemy army they imagined they were needed to tackle, is a mystery.
Images from https://www.facebook.com/groups/505973489414476/permalink/958960260782461/