When I first heard about Gary Johnson’s “Aleppo” gaf, I couldn’t help but think he had a similar problem with common “national leader knowledge” not that long ago.
Took me a while, but found in one of my comments back late in July:

Gary Johnson, the Libertarian Presidential candidate, doesn’t know who Harriet Tubman was. https://t.co/0HonfzEfRG pic.twitter.com/8tUMGGCSXQ

— sean. (@SeanMcElwee) July 24, 2016

If you recall, this was happened right after the week (plus) of FOX News ragegasm over Tubman’s image being selected for the US $20 bill