Here be Dragons!

"Here be dragons" is a phrase used to denote dangerous or unexplored territories, in imitation of the medieval practice of puttingdragons, sea serpents and other mythological creatures in uncharted areas of maps.

The only known historical use of this phrase is in the Latin form "HC SVNT DRACONES" (i.e. hic sunt dracones, here are dragons) on the Hunt-Lenox Globe. (ca. 1503–07). Earlier maps contain a variety of references to mythical and real creatures, but the Lenox Globeis the only known surviving map to bear this phrase. The term appeared on the Lenox Globe around the east coast of Asia, and might be related to the Komodo dragons in the Indonesian islands, tales of which were quite common throughout East Asia.

-Source: Wikipedia

The Origin of The Military Salute

According to modern military manuals, the modern western salute originated in the Middle Ages when knights who greeted each other raised their visors to show their faces, using a motion that resulted in what looks like a modern salute. Their helmets were equipped with protruding pins on the visors to allow the visors to be lifted using the saluting motion. The origin accounts for the common rule of not saluting when not wearing something on your head, as the salute was originally performed only when wearing a helmet (Wikipedia).