The 21 gun salute may have been the shot heard around the world. The first drop referring to the shot heard around the world was on 1/19/2018. One minute later, The Old Guard tweets an image firing in Arlington. The Old Guard's coat of arms also has a red castle in it.
(media.greatawakening.win)
? Notable
fyi A 'shot heard around the world' cannot be overlooked, as the saying means.